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  • Natyashastra

    Why in the News?

    The Indira Gandhi National Centre for the Arts (IGNCA) organised an academic programme titled Natyashastra Synthesis of Theory and Praxis during the 20th Session of UNESCO’s Intergovernmental Committee for the Safeguarding of Intangible Cultural Heritage at the Red Fort, Delhi.

    About Natyashastra

    • Ancient Sanskrit treatise on performing arts
    • Title derived from Natya meaning dance and drama and Shastra meaning science
    • Composed by sage Bharata Muni
    • Dated between 2nd century BCE and 2nd century CE
    • Considered the earliest known treatise on performative arts in South Asia

    Core Themes of Natyashastra

    • Covers drama (natya), performance (abhinaya), music (sangita), emotion (bhava) and aesthetic experience (rasa)
    • Comprises around 36,000 verses
    • Justifies Indian drama as a medium of religious and moral enlightenment

    Global Recognition

    • Included in UNESCO’s Memory of the World Register
    • Recognised for its outstanding global cultural value

    About Indira Gandhi National Centre for the Arts (IGNCA)
    • An autonomous institution under the Ministry of Culture, Government of India

    Mandate of IGNCA

    • Documentation, preservation and dissemination of Indian arts and cultural heritage
    • Training of professionals in cultural studies

    Which one of the following is a work attributed to playwright Bhāsa? (2024)

    (a) Kavyaalankara 

    (b) Natyashasta 

    (c) Madhyama-vyoga 

    (d) Mahabhashya

  • DHRUV64 Microprocessor

    Why in the News?

    India has unveiled DHRUV64, its first fully indigenously developed microprocessor, marking a major milestone in semiconductor self reliance and Atmanirbhar Bharat.

    About DHRUV64

    Fully indigenous microprocessor developed in India
    • Developed by the Centre for Development of Advanced Computing (C DAC)
    • Part of the Microprocessor Development Programme (MDP)

    Key Technical Features

    64 bit dual core processor
    Clock speed of 1.0 GHz ( Very low compared to recent chips like Snapdragan clock speed more 4.0 GHz)
    • Uses superscalar execution allowing multiple instructions simultaneously
    • Supports out of order execution for improved performance
    • Integrated communication and control functions
    • Uses FCBGA packaging, enabling compact and system ready design

    Potential Applications

    Strategic applications and commercial computing
    5G infrastructure
    Automotive electronics
    Consumer electronics
    Industrial automation
    Internet of Things (IoT) systems

    Significance for India

    • Reduces dependence on foreign microprocessors
    • Strengthens domestic semiconductor ecosystem
    • Enables startups, academia and industry to design and test indigenous systems
    • Supports low cost prototype development for new system architectures
    • Enhances technological sovereignty and national security

    When the alarm of your smart-phone rings… which one of the following terms best applies to the above scenario? (2018)

    (a) Border Gateway Protocol 

    (b) Internet of Things 

    (c) Internet Protocol 

    (d) Virtual Private Network

  • Channa bhoi

    Why in the News?

    Scientists have discovered a new species of snakehead fish named Channa bhoi from the state of Meghalaya, adding to India’s freshwater biodiversity.

    About Channa Bhoi

    • Newly identified species of snakehead fish
    • Discovered from a small mountain stream near Iewmawlong village
    • Location: Ri Bhoi district, Meghalaya
    • Named after the Bhoi people, an indigenous group of the Khasi tribe inhabiting the region

    Taxonomic and Ecological Details

    • Belongs to the Gachua group of snakehead fishes
    • The Gachua group is known for high species diversity in the Eastern Himalayan region
    • Phylogenetic analysis shows it is a sister species to Channa bipuli, found in Northeast India

    Distinctive Physical Features

    Bluish grey body colour
    • Each scale has minute black spots
    • Spots form eight to nine horizontal rows of broken lines along the body
    Distinctive banding patterns on the pectoral fins
    • Unique colour pattern differentiates it from closely related species

    Significance of the Discovery

    • Highlights the rich freshwater biodiversity of Northeast India
    • Emphasises the importance of mountain stream ecosystems
    • Reflects ongoing discoveries in the Eastern Himalayan biodiversity hotspot

    Key Prelims Fact

    • With this discovery, the total number of Channa species recorded in India has increased to 26

    In a particular region in India, the local people train the roots of living trees into robust bridges across the streams. As the time passes, these bridges become stronger. These unique ‘living root bridges’ are found in (2015)

    (a) Meghalaya 

    (b) Himachal Pradesh 

    (c) Jharkhand 

    (d) Tamil Nadu

  • Ekam AI and Project SAMBHAV

    Why in the News?

    During Vijay Diwas celebrations, the Indian Army showcased indigenous defence technologies including Ekam AI and Project SAMBHAV, highlighting progress in defence indigenisation and secure digital capabilities.

    About Ekam AI

    Fully indigenous and secure Artificial Intelligence platform
    • Designed for sensitive and classified environments
    • No dependence on foreign software or external cloud systems

    Key Features of Ekam AI

    Data analysis, document management and decision support
    User friendly AI accessible across all personnel levels
    • No requirement of specialised technical expertise
    • Ensures data security and digital sovereignty

    Significance of Ekam AI

    • Strengthens national data sovereignty
    • Reduces strategic dependence on foreign AI platforms
    • Builds trusted national digital infrastructure

    About Project SAMBHAV

    Portable satellite based communication system
    • Developed by the Indian Army
    • Provides mobile connectivity in remote, border and disaster affected areas

    Key Features of Project SAMBHAV

    Rapid deployment capability
    • Functions in network denied areas
    • Supports military operations and civilian disaster response

    Significance of Project SAMBHAV

    • Enhances communication resilience
    • Strengthens national disaster management infrastructure
    • Demonstrates dual use defence technology

    What is Vijay Diwas

    • Observed annually on 16 December
    • Commemorates India’s victory in the 1971 India Pakistan War
    • Led to the liberation of Bangladesh

    Consider the following statements: (2023)

    1. Ballistic missiles are jet-propelled at sub-sonic speeds throughout their fights, while cruise missiles are rocket-powered only in the initial phase of flight. 

    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fu-elled intercontinental ballistic missile. 

    Which of the statements given above is/ are correct? 

    (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

  • 🔴[UPSC Webinar for 2027] By Rohit Sir, Founder, Civilsdaily IAS | Get a 15 Month Micro-theme Based Prep Strategy for UPSC 2027 | Join on 18th December at 5PM

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  • [17th December 2025] The Hindu OpED: The three revolutions shaping American power: 2025 U.S. National Security Stratergy

    PYQ Relevance

    [UPSC 2019] “What introduces friction into the ties between India and the United States is that Washington is still unable to find for India a position in its global strategy, Which would satisfy India’s National self- esteem and ambitions” Explain with suitable examples.

    Linkage: The question addresses power asymmetries and strategic hierarchy in India-U.S. relations, a recurring theme in GS II (International Relations). The article shows how the new U.S. National Security Strategy’s conditional and transactional approach prevents India from securing an equal strategic position, sustaining friction in bilateral ties.

    Introduction

    The 2025 U.S. National Security Strategy represents a decisive departure from the post-1945 American approach to global leadership. Rather than reforming existing multilateral institutions, the strategy reframes governance, alliances, and economic interdependence as instruments of leverage. The NSS reveals a deeper transformation in American statecraft, one that normalises harm, conditionality, and coercion as legitimate tools of power. These changes are best understood through three interlinked revolutions reshaping American power.

    Project 2025

    Meaning: Project 2025 is a conservative policy blueprint prepared by the Heritage Foundation and allied think tanks to restructure the U.S. federal state if Republicans return to power.

    Core Features:

    1. Executive Centralisation: Concentrates power in the President by weakening independent agencies and bureaucratic autonomy.
    2. Ideological Governance: Aligns administration, law enforcement, and regulatory bodies with conservative social and political values.
    3. Administrative Overhaul: Replaces career civil servants with politically aligned appointees to ensure policy compliance.
    4. Domestic Security Framing: Treats migration, culture, and social cohesion as national security issues.

    Significance: Project 2025 provides the domestic ideological foundation for the new U.S. National Security Strategy by redefining governance as an instrument of power rather than restraint.

    New U.S. National Security Strategy (2025)

    Meaning: The 2025 U.S. National Security Strategy outlines Washington’s approach to global power, prioritising great-power competition, economic leverage, and conditional alliances.

    Key Shifts:

    1. From Multilateralism to Conditionality: Replaces rule-based cooperation with transactional partnerships.
    2. China-Centric Strategy: Frames China as the primary systemic challenger across economic, military, and technological domains.
    3. Economic Statecraft: Uses trade, sanctions, supply chains, and finance as strategic tools.
    4. Alliance Recalibration: Reduces automatic commitments; demands burden-sharing and ideological alignment.
    5. Indo-Pacific Priority: Elevates the region while relatively downgrading Europe.

    Significance: The NSS signals a structural shift from liberal internationalism to hierarchical global governance, with direct implications for India, the Global South, and multilateral institutions.

    Political Revolution: Shrinking Civic Space as Statecraft

    Core Transformation

    1. Political Morality: Replaces institutional restraint with instrumental governance, where harm is treated as a policy design feature rather than an unintended consequence.
    2. Civic Norms: Weakens norms of accountability, public reason, and institutional deference.
    3. Cultural Governance: Treats internal cohesion, ideological alignment, and demographic stability as national security assets.

    Institutional Outcomes

    1. Executive Centralisation: Consolidates authority by reducing the autonomy of independent institutions.
    2. Administrative Hardship: Integrates regulatory punishment, purges, and compliance costs into routine governance.
    3. Ideological Statecraft: Reframes pluralism and dissent as vulnerabilities rather than democratic strengths.

    Foreign Policy Revolution: Conditionality Replacing Predictability

    Strategic Reorientation

    1. Alliance Retrenchment: Replaces automatic security guarantees with conditional, transactional commitments.
    2. Geographic Reprioritisation: Downgrades Europe while re-centering the Indo-Pacific as the primary theatre.
    3. Migration Securitisation: Elevates migration from a social issue to a core national security threat.

    Operational Consequences

    1. Multilateral Erosion: Treats international institutions as constraints on sovereignty.
    2. Partner Selection: Prioritises ideological conformity and burden-sharing over shared norms.
    3. Strategic Fragmentation: Produces unstable alliances and reduces crisis predictability.

    Economic Revolution: From Integration to Leverage

    Structural Shift

    1. Globalisation Reframing: Treats economic interdependence as exposure rather than mutual benefit.
    2. Debt and Finance: Formalises the withdrawal from development-oriented global finance.
    3. Trade Instrumentalisation: Uses tariffs, sanctions, and supply chain controls as coercive tools.

    Systemic Effects

    1. Unequal Distribution: Concentrates economic disruption on weaker states and peripheral economies.
    2. Supply Chain Reconfiguration: Promotes diversification aligned with geopolitical loyalty.
    3. Domestic Shielding: Absorbs inflationary and export shocks internally while externalising costs.

    The Return of Imperial Logic in Global Governance

    Underlying Continuity

    1. Hierarchical Order: Restores a world system based on power asymmetry rather than rule-based equality.
    2. Entitlement Framework: Normalises the strong imposing costs while the weak absorb disruption.
    3. Territorial Minimalism: Exercises influence without formal empire through economic and institutional control.

    Conceptual Innovation

    1. Architecture of Cruelty: Integrates suffering into governance logic, rendering harm politically invisible and administratively routine.
    2. Bureaucratic Normalisation: Converts coercion into technical procedure rather than overt domination.

    Conclusion

    The 2025 U.S. National Security Strategy marks a structural redefinition of American power. Through political centralisation, alliance conditionality, and economic coercion, the strategy abandons the stabilising logic of liberal internationalism. The three revolutions together signal a return to hierarchical global governance, where power is exercised through managed disruption rather than shared rules. The consequences are global, systemic, and enduring.

  • The future of governance in post-Maoist India

    Introduction

    The Maoist movement in India emerged and expanded not merely as an armed insurgency but as a response to prolonged governance failure in Fifth Schedule areas. Administrative neglect, weak service delivery, erosion of tribal self-governance, and systematic alienation from land and forests created conditions for parallel Maoist authority structures. While security operations have weakened Maoist violence, the deeper governance paradoxes of the Fifth Schedule administration remain unresolved, threatening durable peace and democratic legitimacy.

    Why in the News

    The article gains relevance as India enters a post-Maoist phase in several Fifth Schedule districts following sustained security operations. While insurgent violence has declined sharply since the peak of the 1990s and early 2000s, governance outcomes in these regions remain weak. Planning Commission’s Expert Group (2008) recorded that regions with abundant natural resources were reduced to “penury due to state neglect and poor governance.” Despite constitutional safeguards, tribal areas continue to face under-representation, diluted self-rule, and extractive development. The contrast between declining insurgency and persistent governance failure marks a critical inflection point in India’s internal security and federal governance trajectory.

    Evolution of Maoism as a Governance Phenomenon

    1. Administrative Neglect: Enabled Maoist penetration by leaving large governance vacuums in health, education, policing, and justice delivery.
    2. Parallel Authority Structures: Maoists provided dispute resolution, welfare access, food rations, and swift justice through kangaroo courts.
    3. Political Mobilisation: Insurgency functioned as a vehicle for tribal assertion against state institutions perceived as extractive.

    Constitutional Vision of the Fifth Schedule

    1. Protective Framework: Designed as a socio-political contract recognising distinct tribal histories and vulnerabilities.
    2. Institutional Architecture: Tribal Advisory Councils, Governor’s special powers, and restrictions on land alienation.
    3. Developmental Autonomy: Emphasised governance aligned with tribal customs, livelihoods, and cultural preservation.

    Structural Failures in Fifth Schedule Governance

    1. Under-Representation of Adivasis: Locals largely excluded from bureaucracy, policing, and revenue administration.
    2. Administrative Alienation: Officials lacked cultural familiarity and sensitivity to tribal social structures.
    3. Weak Institutional Capacity: Fifth Schedule provisions remained procedural rather than transformative.

    Land, Forests, and the Crisis of Resource Governance

    1. Land Alienation: Millions dispossessed despite constitutional safeguards and land acquisition laws.
    2. Revenue Administration Abuse: Land acquisition and forest governance emerged as the most violated provisions.
    3. Extractive Development Model: Mineral-rich regions experienced development without local benefit-sharing.

    Failure of Decentralised Self-Governance Mechanisms

    1. PESA Dilution: Panchayat Extension to Scheduled Areas Act remained poorly implemented and routinely violated.
    2. Gram Sabha Marginalisation: Consent provisions ignored in mining, land acquisition, and forest diversion.
    3. State Resistance: Amendments and administrative practices diluted original intent of self-rule.

    Contradictions in Rights-Based Legislation

    1. Forest Rights Act (FRA): Provided legal protection but faced bureaucratic resistance and weak enforcement.
    2. CAF Act, 2016: Prioritised compensatory afforestation over livelihood and habitation rights.
    3. Legal Dilution: Judicial and executive interventions weakened protective intent of tribal legislation.

    Governance Improvements and Their Limits

    1. Service Delivery Gains: Improved access to roads, telecom, welfare schemes, and digital payments.
    2. Digital Governance: Cash transfers and e-governance reduced some leakages.
    3. Persistent Institutional Weakness: Education, policing, health, judiciary, and revenue administration remain inadequate.

    Post-Maoist Governance Challenge

    1. Leadership Vacuum: Absence of credible tribal leadership in governance institutions.
    2. Performance Deficit: Panchayats in Fifth Schedule areas underperform compared to Sixth Schedule autonomous councils.
    3. Trust Deficit: Continued alienation risks ideological re-radicalisation despite reduced violence.

    Way Forward

    1. Fifth Schedule Reorientation: Ensures faithful implementation of constitutional safeguards by operationalising the Governor’s special responsibilities, strengthening Tribal Advisory Councils, and limiting routine administrative overrides.
    2. PESA-Centred Decentralisation: Restores primacy of Gram Sabhas in land acquisition, mining approvals, forest governance, and welfare delivery to re-establish democratic legitimacy at the grassroots.
    3. Rights-Based Resource Governance: Enforces Forest Rights Act provisions in letter and spirit, integrates livelihood security with conservation, and curbs extractive practices that marginalise tribal communities.
    4. Administrative Inclusion: Expands recruitment, posting, and capacity-building of local tribal personnel in policing, revenue administration, and service delivery institutions.
    5. Development-Security Convergence: Aligns security operations with civil administration through coordinated district.

    Conclusion

    The retreat of Maoist violence in large parts of India marks a significant security achievement, but it does not signify the resolution of the deeper governance crisis that gave rise to Left Wing Extremism. Persistent administrative under-representation of adivasis, dilution of Fifth Schedule protections, weak implementation of PESA and forest rights, and extractive resource governance continue to erode state legitimacy in these regions. Without restoring genuine tribal self-governance, strengthening local institutions, and aligning development with constitutional intent, the post-Maoist phase risks becoming a period of fragile stability rather than durable peace. Sustainable normalcy in Fifth Schedule areas ultimately depends on governance reform, not security dominance alone.

    PYQ Relevance

    [UPSC 2020] What are the determinants of left-wing extremism in Eastern part of India? What strategy should the Government of India, civil administration and security forces adopt to counter the threat in the affected areas? 

    Linkage: This question directly falls under GS Paper III (Internal Security), particularly the syllabus areas of Left Wing Extremism (LWE), role of governance deficits in internal security, and coordinated civil-security responses. It tests the ability to link development, governance, and security, a recurring UPSC demand.

  • Climate change, deforestation worsened impact of SE Asia cyclones

    Introduction

    Rising global temperatures, deforestation, and rapid urbanisation have significantly intensified the flood impacts of tropical cyclones across Sri Lanka, Malaysia, Indonesia, and Thailand. Recent cyclones such as Dithawru and Senyar produced rainfall and flooding far exceeding historical norms, marking a shift from cyclical monsoon flooding to extreme, compound climate disasters.

    Why in the News

    A new attribution study by the World Weather Attribution (WWA) group establishes that climate change, land-use change, and urban expansion together amplified cyclone-induced floods in Southeast Asia to unprecedented levels. Cyclone Senyar made landfall in Indonesia and Malaysia on November 26-27, while Dithawru struck Sri Lanka earlier in November, causing extensive damage and over 1,600 deaths. The study highlights rainfall intensities rising up to 160% in Sri Lanka and 50% in Malaysia compared to pre-industrial baselines, underscoring a structural climate shift rather than isolated weather anomalies.

    Escalating Cyclone Rainfall in a Warming Climate

    1. Global Temperature Rise: Increases atmospheric moisture-holding capacity as temperatures have risen by 1.3°C since the mid-1800s.
    2. Moisture Amplification: Each 1°C rise enables the atmosphere to hold 7% more moisture, intensifying rainfall.
    3. Cyclone Energy Supply: Elevated sea surface temperatures in the North Indian Ocean provided additional latent heat for cyclone formation.
    4. Rainfall Extremes: Five-day rainfall events in Sri Lanka intensified by 160%, while extreme rainfall in Malaysia increased by 50%.

    Sea Surface Temperature Anomalies and Storm Intensification

    1. Above-Normal SSTs: Sea surface temperatures during Cyclone Senyar were 0.2°C higher than the 1991-2020 average.
    2. Storm Development: Warmer oceans increased evaporation rates, strengthening storm systems and prolonging rainfall duration.
    3. Frequency Shift: The study identifies a rise in extreme rainfall frequency rather than mere intensity spikes.

    Deforestation as a Flood Multiplier

    1. Forest Cover Decline: Sri Lanka lost 90% of forest cover between 1900 and 2020.
    2. Hydrological Impact: Reduced infiltration and increased surface runoff amplified landslides and flash floods.
    3. Human Impact: Rainfall-induced landslides in Sri Lanka caused over 600 deaths.
    4. Indonesia Case: Nearly 25% of old-growth forests on palm oil plantations were cleared between 1991 and 2020, reducing natural flood buffers.

    Rapid Urbanisation and Exposure Expansion

    1. Population Exposure: Rising numbers of people reside in high-intensity flood-risk zones across Sri Lanka and Indonesia.
    2. Infrastructure Stress: Roads, railways, and cropland expansion increased surface sealing and runoff velocity.
    3. Flood Pathways: Inadequate drainage and altered land gradients intensified urban flooding during Cyclone Senyar.

    Flood Impacts Beyond Rainfall

    1. Economic Losses: Sustained economic losses estimated between $6-7 billion, equivalent to 3-5% of GDP in affected regions.
    2. Agricultural Damage: More than 137,000 acres of agricultural land damaged due to floods and infrastructure failures.
    3. Secondary Hazards: Flooding triggered dam breaches, canal destruction, and landslides, compounding disaster severity.

    Attribution Science and Policy Significance

    1. Event Attribution: Confirms climate change as a decisive factor in amplifying rainfall and flood impacts.
    2. Shift in Disaster Pattern: Floods no longer limited to monsoon cycles but increasingly driven by short-duration extreme events.
    3. Policy Gap: Highlights inadequate land-use planning and ecosystem protection in climate adaptation strategies.

    Conclusion

    The study establishes that cyclone disasters in Southeast Asia are no longer episodic weather events but outcomes of sustained climate warming, ecological degradation, and unplanned urban growth. Addressing future flood risks requires integrating climate mitigation, forest conservation, and land-use planning into disaster governance frameworks.

    PYQ Relevance

    [UPSC 2023] The Intergovernmental Panel on Climate Change (IPCC) has predicted a global sea level rise of about one metre by AD 2100. What would be its impact in India and the other countries in the Indian Ocean region? 

    Linkage: The article reinforces IPCC projections by showing how warming oceans and climate change amplify coastal flooding risks in the Indian Ocean region. Sea-level rise acts as a risk multiplier, intensifying cyclone impacts, floods, and ecosystem loss in India and neighbouring countries.

  • Bioenergy Capacity Addition in India 

     Why in the News?

    The Ministry of New and Renewable Energy (MNRE) reported major additions in biomass, waste-to-energy and biogas capacity over the last 10 years.
    • Data shared in Lok Sabha on 17 December 2025

    Key Achievements in the Last 10 Years

    Biomass power capacity added: 2,361 MW
    Waste to Energy capacity added: 227.56 MWe
    Biogas plants installed: 2.88 lakh plus plants

    National Bioenergy Programme (NBP)

    • Implemented by MNRE
    Phase I notified on 02 November 2022
    • Time period: 2022 23 to 2025 26
    • Budget outlay: ₹998 crore
    • Supports biogas, biomass, bio CNG and waste to energy projects

    Earlier Bioenergy Schemes

    National Biogas and Manure Management Programme (NBMMP)
    New National Biogas and Organic Manure Programme (NNBOMP)
    Biomass power and bagasse cogeneration scheme
    Energy from urban, industrial and agricultural waste programme

    Prelims Pointers

    • Bioenergy falls under renewable energy
    • MNRE is the nodal ministry
    • Bio CNG is part of SATAT (Sustainable Alternative Towards Affordable Transportation) initiative linkage
    • Waste to energy supports urban waste management
    Consider the following statements about ‘PM Surya Ghar Muft Bijli Yojana’: (2025)

    I. It targets installation of one crore solar rooftop panels in the residential sector. 

    II. The Ministry of New and Renewable Energy aims to impart training on installation, operation, maintenance and repairs of solar rooftop systems at grassroot levels. 

    III. It aims to create more than three lakhs skilled manpower through fresh skilling and up-skilling, under scheme component of capacity building. 

    Which of the statements given above are correct? 

    (a) I and II only (b) I and III only (c) II and III only (d) I, II and III

  • Gestational Diabetes Mellitus (GDM) 

    Why in the News?

    • A large multi-city study highlights the high prevalence of early GDM in Indian women
    • Early GDM linked with higher future diabetes risk

    What is GDM?

    Gestational Diabetes Mellitus is glucose intolerance first diagnosed during pregnancy
    • Affects about 14 percent of pregnancies worldwide

    Types of GDM

    Early GDM (EGDM): Diagnosed before 20 weeks of pregnancy
    Late GDM (LGDM): Diagnosed between 24 to 28 weeks

    STRiDE Study

    • Conducted at 7 antenatal clinics
    • Sample size: over 3000 pregnant women
    • Locations: Chennai, Hyderabad, Puducherry
    • Published in Diabetes Research and Clinical Practice

    Key Findings

    Early GDM prevalence: 21.5 percent
    Late GDM prevalence: 19.5 percent
    • Early GDM affects about 1 in 5 pregnant women

    A company marketing food product advertises that its items do not contain trans-fats. What does this campaign signify to the customers? (2011)

    1. The food products are not made out of hydrogenated oils. 

    2. The food products are not made out of animal fats/oils. 

    3. The oils used are not likely to damage the cardiovascular health of the consumers. 

    Select the correct answer using the code given below: 

    (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

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