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Type: Prelims Only

  • Innovations in Biotechnology and Medical Sciences

    Endocrine Disruptors in Plastic Waste

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Why in the News?

    Microplastics and endocrine-disrupting chemicals (EDCs) are infiltrating the human body, affecting everything from reproduction to cancer risk, metabolism, and child development.

    About Endocrine-Disrupting Chemicals:

    • What They Are: Endocrine-Disrupting Chemicals interfere with the body’s hormone system, affecting growth, reproduction, mood, and metabolism.
    • How They Work: They mimic or block natural hormones like estrogen, testosterone, thyroid hormones, and cortisol, leading to disrupted hormonal signals.
    • Why They’re Dangerous: Even low-level exposure during pregnancy or puberty can cause lasting harm.
    • How We’re Exposed: Through eating contaminated food, inhaling polluted air, or skin contact with certain plastics or cosmetics.
    • Where They’re Found: In plastic bottles (Bisphenol A), toys and cosmetics (phthalates like Di(2-ethylhexyl) phthalate), food wrappers (Per- and Polyfluoroalkyl Substances), and pesticides (dioxins, Polychlorinated Biphenyls).
    • Hidden Harm: They act silently, with long-term effects such as fertility loss, hormonal disruption, or cancer.

    Impact on Human Health:

    • Reproductive Harm: Reduced sperm quality disrupted menstrual cycles, and increased miscarriage risk. Found in semen, placenta, and breast milk.
    • Hormonal Disruption: Chemicals like Bisphenol A trigger early puberty, thyroid issues, and hormonal imbalances.
    • Cancer Risk: Linked to cancers of the breast, uterus, testicles, and prostate. Several are labeled probable carcinogens by global health agencies.
    • Metabolic Effects: Interfere with insulin, promote obesity and type 2 diabetes. PFAS chemicals are linked to liver and heart disease.
    • Brain and Behavior: Associated with ADHD, learning issues, and lower IQ in children, especially when exposure happens early in life.
    • Across Generations: May cause gene expression changes that affect health in future generations—even without direct exposure.
    [UPSC 2020] Why is there a great concern about the ‘microbeads’ that are released into environment?

    Options: (a) They are considered harmful to marine ecosystems * (b) They are considered to cause skin cancer in children (c) They are small enough to be absorbed by crop plants in irrigated fields. (d) They are often found to be used as food adulterants.

     

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  • Festivals, Dances, Theatre, Literature, Art in News

    Dalai Lama and His Reincarnation

    Prelims Only | Art and Culture | Mains Paper 1: Arts & Culture

    Why in the News?

    Turning 90 on July 6, 2025, the 14th Dalai Lama gave his clearest message yet that the Dalai Lama lineage will continue, challenging China’s stance.

    Who is the Dalai Lama?

    • Spiritual Head: The Dalai Lama leads the Gelug (Yellow Hat) school, the most influential tradition in Tibetan Buddhism.
    • Meaning: The title “Dalai Lama” means “Ocean of Wisdom”, first conferred in the 16th century by Mongol ruler Altan Khan.Role: He is considered the reincarnation of Avalokiteshvara, the Bodhisattva of Compassion, in human form.

    Tenzin Gyatso: the 14th Dalai Lama:

    • Early Life: The 14th Dalai Lama, Tenzin Gyatso, was born in 1935 in Taktser, Tibet, and enthroned in 1940 after recognition in 1939.
    • Exile to India: Following China’s occupation of Tibet, he took asylum in India in 1959 and established the Tibetan Government-in-Exile in Dharamsala.
    • Political Transition: In 2011, he relinquished political authority, handing it over to an elected leader of the Tibetan Parliament-in-Exile (TPiE) but retained his spiritual role.
    • Global Peace Advocate: He received the 1989 Nobel Peace Prize for non-violent advocacy and is a prominent promoter of interfaith harmony and secular ethics.

    Key Notes on Tibetan Buddhism:

    • Theology: Tibetan Buddhism blends Mahayana philosophy, Tantric (Vajrayana) rituals, and Bon traditions.
    • Major Schools: It includes four schools—Nyingma, Kagyu, Sakya, and Gelug—with the Gelug school founded by Je Tsongkhapa in the 14th century.
    • Reincarnation System: Leaders like the Panchen Lama and Karmapa are part of the Tulku system, believed to be reincarnated teachers.
    • Textual Foundation: Core texts include the Kangyur (Buddha’s teachings) and Tengyur (commentaries by scholars).
    • Meditation Traditions: Practices like Dzogchen and Mahamudra focus on realizing the true nature of mind.
    • Institutional Legacy: Monasteries such as Drepung, Ganden, and Tashi Lhunpo are vital centers for learning and ritual.
    • Global Influence: Tibetan Buddhism thrives across the Himalayas and is expanding globally, especially in Western countries.
    [UPSC 2018] With reference to Indian history, who among the following is a future Buddha, yet to come to save the world?

    Options: (a) Avalokiteshvara (b) Lokesvara (c) Maitreya* (d) Padmapani

     

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  • Climate Change Negotiations – UNFCCC, COP, Other Conventions and Protocols

    New Collective Quantified Goal (NCQG)

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    With focus shifting to COP30, climate finance is in the spotlight as the Fourth International Financing for Development Conference (FfD4) works to finalise the New Collective Quantified Goal (NCQG) — a more ambitious target to replace the unmet $100 billion annual pledge.

    About New Collective Quantified Goal (NCQG):

    • Overview: It is a new global climate finance target under negotiation to replace the unmet $100 billion pledge made by developed countries in 2009.
    • Basis: It is being framed through the Meeting of the Parties to the Paris Agreement (CMA).
    • Minimum Starting Point: The goal will begin at a minimum of $100 billion per year, with future revisions based on real needs of developing nations.
    • Areas to be Covered: NCQG supports mitigation, adaptation, and resilience, with an explicit focus on the needs of developing countries.

    How it differs from earlier Pledge?

    • From Political to Need-Based: The earlier $100 billion was a political promise, while NCQG is a data-driven, needs-based goal.
    • Backed by National Priorities: Funding estimates will use developing countries’ own assessments and climate plans.
    • Greater Transparency and Trust: NCQG seeks to rebuild trust by addressing the trust deficit from past failures and improving accountability.

    True Scale of Climate Finance Needs:

    • Requirement: As per UNFCCC (2021), developing countries may need $6 trillion/year by 2030 to meet their climate goals.
    • Global Energy Transition Costs: A low-carbon global transition could need $4–6 trillion annually until 2050.
    • Renewable Energy Goals: Tripling renewables by 2030, agreed at COP28, may cost $30 trillion (IRENA).
    • India’s Stand: India has proposed an NCQG of $1 trillion/year, with a focus on grants and concessional finance, avoiding debt-heavy solutions.
    [UPSC 2024] Which one of the following launched the ‘Nature Solutions Finance Hub for Asia and the Pacific’?

    Options: (a) The Asian Development Bank (ADB) (b) The Asian Infrastructure Investment Bank (AIIB) (c) The New Development Bank (NDB) (d) The International Bank for Reconstruction and Development (IBRD)

     

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  • Climate Change Impact on India and World – International Reports, Key Observations, etc.

    Places in News: Kariyachalli Island

    National Parks/WSPrelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    The Tamil Nadu government, with World Bank support, has launched a ₹50 crore restoration project for the sinking Kariyachalli Island.

    About Kariyachalli Island:

    • Overview: Kariyachalli Island is one of the 21 uninhabited islands in the Gulf of Mannar Marine National Park.
    • Geographic Location: It lies 4 km south of Sippikulam and 20 km northeast of Thoothukudi, between Rameswaram and Thoothukudi.
    • Made of Reef Sediments: The island is a low-lying landform made of reef debris, sand dunes, spits, and sandy plains.
    • Biodiversity Hotspot: Located in India’s coral reef zone, it supports 4,300+ marine species, including 132 coral types and the endangered dugong.
    • Ecological Importance: It has seagrass beds and coral reefs that provide food and shelter for marine life.
    • Natural Coastal Shield: Kariyachalli acts as a barrier against cyclones and tsunamis, helping protect the Tamil Nadu coast.
    • Historical Significance: It played a role in mitigating the 2004 Indian Ocean tsunami impact.

    Why is it sinking?

    • Rapid Land Loss: The island has shrunk by over 70%, from 20.85 ha in 1969 to under 6 ha in 2024.
    • High Tide Erosion: At high tide, only 3.14 ha remains, per an IIT Madras (2025) study.
    • Wave and Sediment Pressure: Wave action, sediment loss, and lack of natural shoreline defense are accelerating erosion.
    • Climate Change Impact: Rising sea levels and coral bleaching have weakened the island’s natural protection.
    • Seagrass Depletion: Loss of seagrass beds has reduced the island’s ability to hold sediments and resist erosion.
    • Extreme Weather Events: Frequent cyclones and storms are making the island more vulnerable.
    • Future Risk: If the current trend continues, Kariyachalli may vanish by 2036.
    [UPSC 2023] Which one of the following is the best example of repeated falls in sea level, giving rise to present-day extensive marshland?

    Options: (a) Bhitarkanika Mangroves (b) Marakkanam Salt Pans (c) Naupada Swamp (d) Rann of Kutch*

     

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  • Tiger Conservation Efforts – Project Tiger, etc.

    Why Tigers keep migrating?

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    India’s tiger population is undergoing a major eastward expansion, as young male tigers from central India’s source reserves (like Kanha and Bandhavgarh) disperse into eastern forests (Jharkhand, Odisha, and West Bengal) in search of territory and mates.

    tiger

    Recent Incidents of Tiger Migration:

    • Bandhavgarh (MP) → Palamu (Jharkhand) → Purulia (WB) → Rescued and sent back to Palamu
    • Simlipal (Odisha) → Jharkhand → Lalgarh (WB) → Tiger killed by villagers
    • Tadoba (Maharashtra) → Simlipal (Odisha) → West Bengal → Zeenat the tigress translocated and dispersed

    Back2Basics: Royal Bengal Tiger

    • Declared National Animal of India in 1972 by the Indian Board for Wildlife (IBWL).
    • Largest population in India; also found in Bangladesh, Nepal, Bhutan, China, and Myanmar. India harbours 75% of the world’s wild tigers.
    • Occupies habitats such as high mountains, mangrove swamps, grasslands, deciduous forests, evergreen, and shola forests.
    • Ecological Significance:
      • Flagship species: Essential for conservation efforts since it’s the topmost predator in food chain.
      • Umbrella species: Protecting tigers helps conserve other species (through food chain regulation).
    • Protection Status:
      • Indian Wildlife (Protection) Act, 1972: Schedule I.
      • IUCN Red List: Endangered.
      • CITES: Listed in Appendix I.
    • Project Tiger is a wildlife conservation initiative in India that was launched in 1973.

    Behavioural Traits of Tigers Influencing Dispersal:

    • Territorial Independence: Upon maturity, male tigers must leave their natal territory to find exclusive prey-rich zones and mates, triggering long-distance dispersal.
    • Gendered Dispersal:
      • Males are wanderers – they cover vast areas and often cross multiple states.
      • Females are philopatric – they stay close to their birthplace and are usually accepted by nearby relatives.
    • Source-Sink Dynamics:
      • Source forests (e.g. Kanha, Bandhavgarh) produce surplus tigers due to good prey and protection.
      • Sink forests (e.g. Palamu, Dalma) cannot sustain tiger populations without new immigrants.
    • Adaptive but Risk-Prone: Tigers are biologically wired to explore new habitats, even degraded ones, but often face food scarcity, isolation, and human conflict.
    • Prey Dependence and Conflict: In prey-deficient forests, floater tigers’ resort to livestock hunting, increasing the risk of human-tiger conflict.
    • Resilience and Colonisation Instinct: Despite setbacks, tigers attempt to colonise new areas, offering hope for species expansion if supported by proper conservation.
    [UPSC 2024] Consider the following statements:

    1. Lions do not have a particular breeding season.

    2. Unlike most other big cats, cheetahs do not roar.

    3. Unlike male lions, male leopards do not proclaim their territory by scent marking.

    Which of the statements given above are correct?

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

     

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  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    [pib] Indian Scientists created high-performance Supercapacitor Material

    PIBPrelims Only | Science Tech | Mains Paper 3: Achievements Of Indians In S&T

    Why in the News?

    Scientists from Bengaluru, in collaboration with Aligarh Muslim University, have developed an advanced material that significantly improves supercapacitor performance.

    What are Supercapacitors?

    • Fast-Charging Energy Devices: Supercapacitors are special tools that store and release energy very quickly, much faster than regular batteries.
    • Used in Modern Technology: They are found in phones, electric vehicles, and solar systems where fast energy delivery is needed.
    • Trade-Off in Storage: While they charge faster, they generally hold less energy than traditional batteries.
    • Ongoing Scientific Efforts: Researchers are trying to increase energy capacity without sacrificing their quick-charging abilities.

    About Lanthanum-Doped Silver Niobate:

    • New Material from Indian Scientists: A research team from Bengaluru and Aligarh Muslim University created a better material for supercapacitors.
    • Silver Niobate as Base: They used silver niobate, which is non-toxic and eco-friendly, as the base material.
    • Improved by Lanthanum Doping: They added lanthanum, a rare metal, to help enhance electrical performance — a method called doping.
    • Smaller Particles, Bigger Surface: The particles became smaller, increasing the surface area for energy storage.

    What makes this material special?

    • Better with Use: The material retained 118% of its capacity after repeated use, showing it improved over time.
    • 100% Energy Efficiency: It wasted no energy during charge or discharge, making it highly efficient.
    • Quick and Smooth Performance: It delivered energy faster and more steadily than previous materials.
    • Proven in Real-World Test: A test device using this material could power an LCD screen, proving practical use.
    • Eco-Friendly Choice: It is lead-free and safe for the environment.
    • Future Potential: Scientists hope to apply this method to other materials and scale up for commercial use in electronics, EVs, and solar tech.
    [UPSC 2022] With reference to India, consider the following statements:

    1. Monazite is a source of rare

    earths. 2. Monazite contains thorium. 3. Monazite occurs naturally in the entire Indian coastal sands in India. 4. In India, Government bodies only can process or export monazite.

    Which of the statements given above are correct ?

    Options: (a) 1, 2 and 3 only (b) 1, 2 and 4 only* (c) 3 and 4 only (d) 1, 2, 3 and 4

     

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  • Indian Navy Updates

    Induction of INS Udaygiri

    Prelims Only | Security Issues | Mains Paper 3: Various Security Forces, Agencies & Their Mandates

    Why in the News?

    India has advanced its indigenous naval capabilities with the induction of INS Udaygiri, the second stealth frigate built under Project 17A.

    ins udaygiri

    About INS Udaygiri:

    • Overview: It is the second stealth frigate delivered under Project 17A, marking a major milestone in India’s indigenous naval capabilities.
    • Legacy Name: Named after the decommissioned INS Udaygiri (F35), a Leander-class frigate that served from 1976 to 2007.
    • Construction: Delivered on July 1, 2025, by Mazagon Dock Shipbuilders Ltd (MDL) just 37 months after its launch, making it one of the fastest deliveries in the project.
    • Indigenous Technology: Contains homegrown sensors and combat systems, showcasing domestic defence manufacturing.
    • MSME Contribution: Over 200 Indian MSMEs participated in construction, aligning with the Aatmanirbhar Bharat mission.
    • Combat Features:
      • Blue-Water Capable: Designed for long-range operations, it can counter conventional and asymmetric threats, projecting Indian power in distant seas.
      • Stealth Features: Incorporates radar-absorbent materials and a low-infrared signature, making it hard to detect.
      • Arsenal: Equipped with supersonic surface-to-surface missiles, medium-range SAMs, a 76 mm main gun, and CIWS (30 mm and 12.7 mm).
      • Efficient Propulsion: Uses a combined diesel and gas (CODAG) propulsion system for both speed and efficiency.

    What is Project 17A?

    • Overview: It is the Indian Navy’s initiative to build seven stealth guided-missile frigates, launched in 2019 as a successor to Project 17 (Shivalik-class).
    • Shipbuilders Involved: Construction is shared between MDL (Mumbai) and GRSE (Kolkata) under Navy’s Warship Design Bureau (WDB).
    • Modern Design Features: Ships feature stealth hulls, reduced infrared signatures, and modular weapon systems.
    • Timeline and Launches: The first frigate, INS Nilgiri, was launched in 2019, with all ships targeted for delivery by 2026.
    • Technology Upgrades: Includes advanced radar, electronic warfare systems, and higher automation and survivability.
    • Indigenous Content: Project 17A emphasizes domestic components, supporting the Make in India defence policy.
    • Multi-Role Capabilities: Designed for anti-air, anti-surface, and anti-submarine warfare, suitable for high-threat scenarios.

     

    [UPSC 2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently?

    Options: (a) Amphibious warfare ship (b) Nuclear-powered submarine (c) Torpedo launch and recovery vessel* (d) Nuclear-powered aircraft carrier

     

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  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    [pib] Breakthrough in Altermagnets Study

    PIBPrelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Why in the News?

    Researchers at S N Bose National Centre for Basic Sciences (SNBNCBS) have discovered a novel transport behaviour in chromium antimonide (CrSb), a member of the emerging class of magnetic materials called altermagnets.

    What are Altermagnets?

    • Definition: Altermagnets are a new class of magnetic materials that combine properties of ferromagnets (which show external magnetism) and antiferromagnets (which don’t).
    • Unique Feature: They don’t attract metals like fridge magnets but still have active internal magnetic behavior, useful in advanced technology.
    • Use in Spintronics: These materials are ideal for spintronics, a technology that uses electron spin (not just charge) to make faster and energy-efficient devices.
    • No Magnetic Interference: Altermagnets do not create external magnetic fields, so they are stable and safe for nearby electronics.
    • Energy Efficient: Their structure helps reduce heat and energy loss, which is perfect for modern low-power gadgets.
    • Scientific Rarity: Very few altermagnets are known, making each discovery important for materials science.
    • Potential Applications: They could help build smaller memory chips, faster processors, and even support quantum computing.
    • Internal Action: Think of them as “quiet magnets” — they work inside devices without magnetic noise.

    Recent Discovery- Chromium Antimonide (CrSb):

    • Indian Breakthrough: Indian scientists found CrSb, a new altermagnet, showing rare direction-dependent conduction.
    • Directional Behavior: CrSb acts as an n-type material when current flows along its layers, and as a p-type when current flows across them.
    • First of its Kind: This is the first time an altermagnet has shown such dual conduction behavior in different directions.
    • Device Simplification: Since CrSb can behave as both p-type and n-type, it can reduce circuit size and eliminate the need for doping.
    • Eco-friendly Material: CrSb is made from non-toxic, common elements, making it ideal for sustainable electronics.
    • Potential Applications:
      • Future Potential: CrSb could be used in solar cells, batteries, and processors to make them greener and more efficient.
      • Environment-Friendly Tech: CrSb enables low-cost and eco-friendly electronics without sacrificing performance.
    [UPSC 2021] Magnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following? 1. Brakes of motor vehicles 2. Engines of motor vehicles 3. Microwave stoves within homes 4. Power plants 5. Telephone lines Select the correct answer using the code given below.

    Options: (a) 1, 2, 3 and 5 only (b) 1, 2 and 4 only* (c) 3, 4 and 5 only (d) 1, 2, 3, 4 and 5

     

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  • Policy Wise: India’s Power Sector

    What is India Energy Stack?

    Prelims Only | Economics | Mains Paper 3: Infrastructure: Energy, Ports, Roads, Airports, Railways Etc.

    Why in the News?

    The Union Ministry of Power announced the formation of a task force to design the India Energy Stack (IES) — a new Digital Public Infrastructure (DPI) for the energy sector.

    What is India Energy Stack?

    About India Energy Stack (IES):

    • Overview: IES is a Digital Public Infrastructure (DPI) initiative by the Ministry of Power.
    • Objective: It aims to create a unified, secure, and interoperable digital backbone for India’s entire energy ecosystem, including producers, grid operators, discoms, consumers, regulators, and markets.
    • Task Force: It is led by a 17-member task force with Nandan Nilekani as Chief Mentor, and RS Sharma as Chairperson, supported by REC Ltd as the nodal agency.
    • Implementation: A 12-month proof of concept (PoC) will pilot key components like the Utility Intelligence Platform (UIP) in states like Delhi, Gujarat, and Maharashtra.
    • Larger Impact: It is expected to support India’s transition to Net Zero, manage increasing renewable energy share, and enable consumer participation in energy trading.

    Key Features of India Energy Stack:

    • Scalability and Integration: It supports the integration of smart meters, real-time analytics, and battery storage systems, aligning with India’s energy digitisation goals.
    • Unique IDs: Provides digital identification for consumers, assets, and energy transactions, enabling seamless tracking and verification.
    • Real-Time Data Sharing: Consent-based, standardised data exchange mechanisms between stakeholders improve efficiency and transparency.
    • Open APIs: Allows integration of third-party solutions, encouraging innovation and energy fintech ecosystems.
    • Interoperability: Facilitates communication between currently fragmented digital platforms used by different state utilities and regulators.
    • Utility Intelligence Platform (UIP): A modular analytics layer to enable grid monitoring, load forecasting, demand-response, and consumer insights.
    • Peer-to-Peer Energy Trading: Empowers prosumers (producers + consumers) to buy, sell, or store energy using a digital marketplace.
    • Carbon Offset Tracking: Supports environmental compliance through transparent and verifiable emission reduction accounting.
    • Decentralised Energy Management: Enables small-scale producers and communities to participate in energy markets via smart contracts and virtual power plants.
    [UPSC 2016] Which one of the following is a purpose of ‘UDAY’, a scheme of the Government?

    (a) Providing technical and financial assistance to start-up entrepreneurs in the field of renewable sources of energy

    (b) Providing electricity to every household in the countries by 2018

    (c) Replacing the coal-based power plants with natural gas, nuclear, solar, wind and tidal power plants over a period of time

    (d) Providing for financial turnaround and revival of power distribution companies*

     

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  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    Electronic Private Automatic Branch Exchange (EPABX) in Modern Communication

    Prelims Only | Science Tech | Mains Paper 3: S&T – Applications In Everyday Life

    Why in the News?

    In most modern office environments, internal and external communication is managed through a technology known as EPABX — Electronic Private Automatic Branch Exchange.

    About EPABX:

    • What is it: It is a system used by offices to manage internal and external phone calls efficiently.
    • Internal and External Communication: It enables intercom communication within the organisation and provides access to external telephone lines through a unified network.
    • Call Handling Features: EPABX can route, transfer, forward, or hold calls, reducing the need for multiple phone lines and improving overall communication.
    • Modern Features: Advanced EPABX systems offer voicemail, call recording, automated attendants, and digital tool integration for business productivity.

    How EPABX Works?

    • Starting a Call: When the phone is picked up, an off-hook signal goes to the EPABX, which responds with a dial tone.
    • Making Internal Calls: Users dial an extension number (like 104), and the EPABX connects them through its internal switching system.
    • Making External Calls: To reach outside numbers, users dial an access code (usually 0) followed by the number; EPABX connects via the Public Switched Telephone Network (PSTN).
    • Handling Incoming Calls: Calls from outside are routed to the right extension using either a receptionist or an automated system (IVR) in newer setups.
    • Switching Logic: The EPABX system works like a railway yard, directing signals along the correct path between the caller and the recipient.

    Advancements in EPABX Technology:

    • Early Systems: Older EPABX systems used electromechanical switches like crossbars for call routing.
    • Digital Transition: Since the 1980s, systems adopted Pulse Code Modulation (PCM) and Time Division Multiplexing (TDM) to digitise and share voice signals over fewer lines.
    • VoIP Technology: Modern EPABX uses Voice over IP (VoIP) to transmit calls over the internet, similar to email routing using IP addresses.
    [UPSC 2019] With reference to communication technologies, what is/are the difference / differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)?

    1. LTE ‘is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.

    2. LTE is data-only technology and VoLTE is voice-only technology.

    Select the correct answer using the code given below.

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

     

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