💥UPSC 2027,2028 Mentorship (April Batch) + Access XFactor Notes & Microthemes PDF

Type: Prelims Only

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

    Puri Rath Yatra of Lord Jagannath

    Why in the News?

    The annual Rath Yatra of Lord Jagannath at Puri, Odisha, has begun today.

    About Rath Yatra:

    • About: Rath Yatra is an annual Hindu chariot festival celebrated in Puri, Odisha, in honour of Lord Jagannath, a form of Lord Vishnu.
    • Legend: The festival commemorates the journey of Lord Jagannath, along with his siblings Lord Balabhadra and Devi Subhadra, from the Jagannath Temple to the Gundicha Temple, their birthplace.
    • Occurrence: It is held on the second day of Ashadha Shukla Paksha (June–July), according to the Odia calendar.
    • Procession: The deities are placed in three massive wooden chariots and pulled by devotees along the Grand Road (Bada Danda) for about 3 km.
    • Significance: It is one of the four sacred pilgrimages (Char Dham) in Hinduism and allows non-Hindus to have darshan of the deities, unlike entry to the temple.

    Key Events of the Rath Yatra:

    • Pahandi Bije: The ceremonial procession where the deities are carried from the temple to the chariots.
    • Chhera Panhara: A ritual where the Puri King sweeps the chariots with a golden broom, signifying humility and equality.
    • Three Chariot Pulling: Devotees pull the chariots—Nandighosa (Jagannath), Taladhwaja (Balabhadra), and Darpadalan (Subhadra)—toward Gundicha Temple.
    • Bahuda Yatra: The return journey to the Jagannath Temple, held on the 10th day of Ashadha Shukla Paksha.
    • Poda Pitha Offering: The deities are offered traditional cakes at Mausimaa Temple during their return.
    • Suna Besha: On return, the deities are adorned with gold ornaments on their chariots.
    • Niladri Bije: Final ritual where the deities re-enter the sanctum; marks the end of the Rath Yatra.
    • Rasagola Divas: Devotees offer Rasagola sweets to Goddess Lakshmi to appease her for not being included in the journey.

    Back2Basics: Jagannath Puri Temple

    • The Jagannath Temple in Puri, Odisha, is a major Vaishnavite shrine dedicated to Lord Jagannath, a form of Sri Krishna.
    • The current structure was rebuilt starting in the 10th century by Anantavarman Chodaganga Deva of the Eastern Ganga dynasty.
    • The temple showcases the Oriya style of architecture, known for sculptural richness and graceful forms.
    • It spans over 400,000 sq. ft., enclosed by the 20-foot-high Meghanada Pacheri.
    • An inner wall, called Kurma Bedha, surrounds the main sanctum.
    • Main Structural Sections:
      1. Deula/Vimana/Garba Griha: Sanctum sanctorum housing the deities on the Ratnavedi, built in Rekha Deula style.
      2. Mukhashala: The frontal porch.
      3. Nata Mandir/Jagamohan: The audience or dancing hall.
      4. Bhoga Mandapa: The hall of offerings.

     

    [UPSC 2009] Mahamastakabhisheka, a great religious event, is associated with and done for who of the following?

    Options: (a) Bahubali * (b) Buddha (c) Mahavir (d) Nataraja

     

  • Agricultural Sector and Marketing Reforms – eNAM, Model APMC Act, Eco Survey Reco, etc.

    India to host Regional Wing of International Potato Center (CIP)

    Why in the News?

    The Union Cabinet approved the establishment of the CIP-South Asia Regional Centre (CSARC) of the International Potato Centre (CIP) in Singna, Agra, Uttar Pradesh.

    About the International Potato Centre (CIP):

    • Establishment: The CIP was founded in 1971 in Lima, Peru, to promote research on potato, sweet potato, and Andean root crops.
    • Global Reach: CIP operates in South America, Africa, and Asia, focusing on sustainable agriculture and nutritional security.
    • India Collaboration: CIP began its work in India in 1975 through an agreement with the Indian Council of Agricultural Research (ICAR).
    • Germplasm Collection: It maintains the world’s largest germplasm bank for potato and sweet potato, making it central to crop breeding and biotech innovation.
    • Research Areas: CIP’s activities include crop improvement, pest and disease control, post-harvest technologies, and market linkages.
    • Partnership Model: The center works with local governments, agricultural institutions, and NGOs to develop climate-resilient, high-yielding varieties.

    Functions of the New Regional Center (CSARC) in India:

    • Location and Purpose: The new CIP-CSARC is being set up in Singna, Agra, to serve India and South Asia.
    • Core Focus: It will work on developing climate-resilient, disease-free, and processing-grade varieties of potato and sweet potato.
    • Food Security Goals: The center aims to enhance food and nutrition security, farmer income, and rural employment through improved productivity and value-added agri-products.
    • Global Linkages: It will provide Indian researchers access to CIP’s global network, innovations, and genetic resources.
    • Post-Harvest Development: It will strengthen seed quality, post-harvest systems, and improve India’s export potential in potato-based crops.
    • National Importance: This will be the second major international agri-research institute in India, after IRRI-SARC in Varanasi.

    Potato Cultivation in India:

    • About: Potato (Solanum tuberosum) is known as the “King of Vegetables” and is India’s fourth most important food crop after rice, wheat, and maize.
    • Origin: Introduced to India by Portuguese traders in the 17th century; It is a native crop of the Peruvian-Bolivian Andes.
    • Geographic Spread: Grown in 23 states, but 85% of production comes from the Indo-Gangetic plains in North India.
    • Global comparison: India is the second-largest potato producer globally after China, producing 51.3 million tonnes in 2020.
    • Top Producing States:  India’s average potato yield is 25 tonnes/hectare, which is only half the estimated potential of 50+ tonnes/hectare due to poor seed quality.
      • Uttar Pradesh: ~30% of total output
      • West Bengal: ~23.5%
      • Bihar: ~17%
      • Other contributors: Punjab, Gujarat, Madhya Pradesh
    • Climate Needs: Potato is a cool-season crop.
      • Ideal growth temp: 24°C
      • Ideal tuber formation temp: 20°C
    • Soil Requirements: Prefers well-drained, fertile soils with moisture retention.
    • Planting Seasons:
      • Himachal Pradesh, Uttarakhand: Spring (Jan–Feb), Summer (May)
      • Punjab, Haryana, UP, Bihar, Bengal: Main crop in October
      • MP, Maharashtra, Karnataka: Both kharif and rabi seasons
    • Seed Management: Use disease-free, sprouted seeds (30–50g);
    • Popular varieties: Kufri Jyoti, Kufri Bahar, Kufri Pukhraj, and Kufri Chandramukhi.
    • Fertilization & Irrigation: Apply balanced nutrients, especially phosphorus and potassium; drip irrigation is recommended.
    • Harvesting: Ready in 90–120 days, harvested manually or mechanically.

     

    [UPSC 2024] Consider the following plants:

    1. Groundnut 2. Horse-gram 3. Soybean

    How many of the above belong to the pea family?

    Options: (a) only one (b) only two (c) All three* (d) None

     

  • In news: International Olympic Committee (IOC)

    Why in the News?

    Kirsty Coventry, aged 41, has become the first African and the first woman to head the International Olympic Committee (IOC).

    Also in news:

    The IOC has paused the selection process for future Olympic Games hosts, impacting India’s bid for the 2036 Olympics.

    About the International Olympic Committee (IOC)

    • Overview: It is a non-governmental international organisation established in 1894, and is headquartered in Lausanne, Switzerland.
    • Functions: It sets the rules and framework for the Olympic Games, including deciding on host cities and event structures.
    • Membership: IOC members must be proficient in French or English and be citizens or residents of countries with a National Olympic Committee (NOC).
    • Jurisdiction: The IOC acts as the final authority on matters related to the Olympic Games and the Olympic movement.
    • Indian and the IOC:
      • The Indian Olympic Association (IOA) has been recognized by the IOC since 1927.
      • It is responsible for selecting and sending Indian athletes to the Olympics and other major international competitions.
  • Zoonotic Diseases: Medical Sciences Involved & Preventive Measures

    Agricultural Fungicides causing C. Tropicalis Infections

    Why in the News?

    Researchers at Fudan University found that overuse of the fungicide tebuconazole is causing azole-resistant Candida tropicalis to emerge — a deadly fungus with a 55–60% mortality rate.

    About Candida tropicalis:

    • Overview: Candida tropicalis is a fungal pathogen prevalent in tropical and subtropical regions, including India.
    • Type: It is a yeast species that causes invasive candidiasis, affecting the bloodstream and internal organs.
    • High-Risk Groups: The fungus is opportunistic, primarily infecting immunocompromised individuals such as cancer patients and those in ICUs.
    • Mortality Rate: The infection has a high mortality rate, estimated at 55–60% when it becomes systemic.
    • Drug Treatment: Standard treatments include azole-class antifungals such as fluconazole and voriconazole (widely used during COVID-19 induced Black Fungus).
    • Adaptability: The pathogen shows strong genomic plasticity, allowing it to survive hostile environments and develop drug resistance.

    Reasons for Spread and Resistance:

    • Agricultural Influence: Studies show that azole fungicides like tebuconazole, used in farming, contribute to azole-resistant C. tropicalis
    • Environmental Exposure: These fungicides accumulate in soil and water, promoting the evolution of resistant strains.
    • Genetic Adaptations: Resistant strains develop aneuploidy (extra chromosomes), aiding resistance but reducing growth in drug-free environments.
    • Efflux Pumps: Some strains duplicate genes like TAC1, boosting drug-efflux pumps (e.g., ABC transporters) to eject antifungals from the cell.
    • Increased Virulence: Resistant strains have proven more virulent in animal studies, posing greater public health risks.

     

  • Pharma Sector – Drug Pricing, NPPA, FDC, Generics, etc.

    Substandard Cancer Drugs: A Global Public Health Alarm

    Why in the News?

    A global investigation has revealed that vital chemotherapy drugs used in over 100 countries have failed quality tests, posing life-threatening risks to cancer patients.

    Various Drugs Used for Cancer Treatment:

    • Cisplatin is a platinum-based drug discovered in the 1960s. It binds to DNA in cancer cells and is widely used to treat testicular, ovarian, bladder, and lung cancers. It is known to cause kidney damage, hearing loss, and immune suppression.
    • Oxaliplatin is another platinum compound mainly used to treat advanced colorectal cancer. It works similarly to cisplatin but may also cause nerve-related side effects.
    • Cyclophosphamide is used for treating breast cancer, leukaemia, sarcoma, and lymphoma. It damages cancer cell DNA and lowers white blood cell counts, weakening the immune system. It can also cause bladder inflammation.
    • Doxorubicin, known as the “Red Devil”, is derived from soil bacteria and used against breast cancer, leukaemia, and sarcomas. It disrupts DNA replication but has serious side effects, including heart damage and hair loss.
    • Methotrexate blocks enzymes involved in DNA synthesis and is used for leukaemia, lymphoma, and various tumors. It is often followed by leucovorin, which helps protect normal cells from damage.
    • Leucovorin is not a chemotherapy drug but a supportive agent used with methotrexate to reduce toxicity. It is a form of vitamin B9 introduced in the 1950s.

    Recent Quality Test Failure

    • Investigation: A 2024 investigation revealed that chemotherapy drugs sold in over 100 countries failed basic quality standards.
    • Failure of Generics: The drugs tested were generics. Also, 189 unexpired samples were tested; 20% failed.
    • Indian Pharma Under Radar: 17 manufacturers were flagged, with 16 based in India. Drugs failed for containing either too little (under 88%) or too much (over 112%) active ingredient.
    [UPSC 2005] It begins as a single cell and grows into a merciless disease that claims millions of lives year after year. But scientists are steadily unlocking its mysteries, and the fight against it may now have reached a dramatic turning point. New discoveries promise better therapies and hope in the war against …” The disease referred to in the above quotation is:

    Options: (a) Cancer (b) AIDS (c) Tuberculosis (d) Alzheimer’s disease

     

  • International Space Agencies – Missions and Discoveries

    What is Axiom-4 Mission?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Axiom-4 Mission

    Why in the News?

    The launch of Axiom-4 (Ax-4), a private mission to the International Space Station (ISS), has finally lifted-off after several postponements due to weather conditions.

    About Axiom-4 Mission:

    • Axiom Mission 4 (Ax-4) is a private spaceflight organized by Axiom Space.
    • It aims to transport a crew to the International Space Station (ISS) for a 14-day mission.
    • This will be Axiom Space’s 4th mission to the ISS, following their previous missions (Ax-1, Ax-2, and Ax-3).
    • The mission will launch from the Kennedy Space Center in Florida using SpaceX’s Falcon 9 rocket.
    • The spacecraft for this mission is a SpaceX Crew Dragon, known for its advanced technology and safety features.
    • This mission is organised in collaboration with NASA, highlighting a strong partnership between private space companies and government space agencies to further space exploration and research.
    • Crew:
      1. Peggy Whitson: A veteran astronaut with extensive experience, having completed multiple missions to the ISS.
      2. Sławosz Uznanski: A Polish astronaut joining the mission, marking a significant milestone for Poland in space exploration.
      3. Tibor Kapu: A Hungarian astronaut, adding to the diversity of the mission crew.
      4. Group Captain Shubhanshu Shukla: An Indian astronaut, making headlines as part of this international crew.

    Significance of Ax-4 Mission for India

    • The mission is a collaborative effort resulting from an agreement between ISRO and NASA.
    • It provides ISRO with an early opportunity to test experiments in space, originally planned for Gaganyaan.
    • Key Indian Experiments on Axiom-4:
      • Microgravitys impact on muscle dysfunction.
      • Use of computer screens in zero gravity and their effects on human cognition and vision.
      • Growth of six varieties of crop seeds in space conditions.
      • Tardigrade survival study—these microscopic creatures can endure extreme environments and may provide insight into life support systems in space.

    Back2Basics: International Space Station (ISS)

    • The ISS, orbiting 430 kilometres above Earth, completes 16 orbits daily, witnessing 16 sunrises and sunsets.
    • It orbits Earth every 90 minutes at 8 km per second.
    • Spanning 109 meters, it’s almost as long as an American football field.
    • It includes 6 sleeping areas, 2 bathrooms, a gym, and a panoramic view bay window.
    • Its solar array wingspan is 109 meters, and the station houses about 13 km of electrical wiring.
    • Its journey began on November 20, 1998, with Russia’s Zarya Control Module.
    • The US added the Unity Node 1 module on December 4, 1998, marking the start of a functional space lab.
    • It evolved into its current form after 42 assembly flights.

     

    PYQ:

    [2019] What is India’s plan to have its own space station and how will it benefit our space programme?

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

    Sam Altman’s World ID Project

    Why in the News?

    World ID is Sam Altman’s ambitious project to create a secure, biometric-based digital identity for everyone in the age of AI.

    What is World ID?

    • World ID is a digital identity system launched by Sam Altman’s company Tools for Humanity as part of the Worldcoin project in July 2023.
    • It aims to verify that a person is a real, unique human being—especially in an age of AI-generated bots—using biometric iris scans.
    • How Does It Work?
      • The identity is created using a device called the Orb, which captures the iris pattern and generates a unique cryptographic code (not storing the image itself).
      • This ID is then linked to the World App, and the user can access various services while proving they are human—without revealing their actual identity.
      • The system is decentralized and uses blockchain technology to store identity proofs securely.

    Key Features of World ID:

    • Biometric Verification: Uses iris scanning through the Orb to establish a unique identity.
    • Global Access: Users from over 160 countries have access to Worldcoin and World ID features.
    • Decentralized Protocol: Built on open-source, privacy-preserving cryptography, such as zero-knowledge proofs.
    • World App Integration: Enables users to locate Orbs, receive Worldcoins, and use the digital ID across apps.
    • World Chain: A blockchain linked to World ID that supports apps and services tied to identity.
    • Crypto Incentive: Users may receive Worldcoin (WLD) tokens for enrolling.
    • Privacy Controls: Promises anonymity, non-surveillance use, and code transparency.
    • Hardware Dependency: Requires a physical Orb or the new Orb Mini to generate IDs.

    How it differs from Aadhaar?

    World ID Aadhaar
    Ownership Private project by Tools for Humanity Government of India
    Launch Year 2023 2009
    Technology Used Iris scan via Orb; Blockchain-based ID Biometric + Demographic data via central database
    Legal Framework No national law backing it yet Aadhaar Act, 2016
    Purpose Global ID to prove human uniqueness National ID for accessing services & welfare
    Data Privacy Claims privacy via zero-knowledge cryptography Data regulated by UIDAI under Indian law
    Adoption Level 12 million users globally Over 1.3 billion users in India
    Hardware Needed Orb device Fingerprint/iris scanners at enrollment centers
    Verification Use AI-bot detection, global ID use Government subsidies, banking, KYC, etc.

     

  • Oil and Gas Sector – HELP, Open Acreage Policy, etc.

    What are Strategic Petroleum Reserves (SPR)?

    Why in the News?

    India is planning to establish six new Strategic Petroleum Reserve (SPR) sites to boost energy security amid rising global oil risks.

    About Strategic Petroleum Reserves (SPR):

    • Overview: SPRs are emergency stockpiles of crude oil maintained by the government to manage supply disruptions caused by events like wars, embargoes, or price shocks.
    • Purpose: To ensure national energy security and reduce vulnerability to external supply shocks.
    • Historical Context: India realised the need for SPRs after the 1990 Gulf War, which caused supply cuts and spiking oil prices and ultimately the Balance of Payment (BoP) Crisis.
    • Foundation: The SPR project began in the early 2000s based on advice from the Planning Commission’s Integrated Energy Policy.
    • Governing Body: In 2004, the government set up Indian Strategic Petroleum Reserves Limited (ISPRL) as a Special Purpose Vehicle under the Oil Industry Development Board (OIDB).
    • India’s three-pronged oil security framework:
      1. Commercial oil stocks by public and private oil marketing companies (OMCs).
      2. Strategic reserves by ISPRL for emergencies.
      3. Equity oil assets abroad through companies like ONGC Videsh Ltd. (OVL).
    • Storage: Unlike commercial stocks, SPRs are stored in underground rock caverns, which are safer, more secure, and suited for long-term preservation.

    Current SPR Infrastructure:

    • SPR Locations: India has three active SPR sites:
      • Visakhapatnam (Andhra Pradesh)
      • Mangaluru (Karnataka)
      • Padur (Karnataka)
    • Total Capacity: The combined SPR capacity is 5.33 MMT or roughly 39 million barrels.
    • Coverage Duration: This reserve can meet about 9.5 days of India’s daily oil requirement (≈5.5 million barrels/day).
    • Distinction from OMC Stocks: These strategic stocks are separate from commercial stocks held by companies like IOCL, HPCL, and BPCL.

    Planned Expansion of SPRs in India:

    • Goal: India aims to double SPR capacity due to rising geopolitical risks and import dependence.
    • New Facilities Planned:
      • Chandikhol (Odisha) – 4 MMT (in two phases)
      • Padur Phase II (Karnataka) – 2.5 MMT
    • 6 new SPR locations are being planned at various sites, including Mangalore SEZ (Karnataka) and salt caverns in Bikaner (Rajasthan).
    • Future Capacity: After expansion, India’s total SPR stock will be 11.83 MMT, covering around 22 days of national demand.
    • Strategic Vision: The long-term objective is to build up 90 days of oil reserves, in line with International Energy Agency (IEA) guidelines.
  • Interstate River Water Dispute

    Banakacherla Project Dispute

    Why in the News?

    A fresh political and inter-state water dispute has erupted between Telangana and Andhra Pradesh over the proposed Banakacherla Reservoir Project.

    Banakacherla Project Dispute

    About the Banakacherla Project:

    • About: Also known as the Godavari-Banakacherla or Polavaram-Banakacherla Link Project, it is an ambitious interlinking plan proposed by the Andhra Pradesh government.
    • Objective: It aims to divert surplus Godavari River water via the Polavaram Project, through the Krishna basin, to reach the Banakacherla regulator in Kurnool district.
    • Reservoirs: The project involves construction of a new Bollapalli reservoir in Guntur district, enhancement of canal capacities (e.g., Polavaram canal from 17,500 to 38,000 cusecs), and a network of lift stations and tunnels through the Nallamala forest.
    • Water Pathway: It begins at Polavaram dam, moves to Bollapalli, and ends at Banakacherla, integrating Godavari, Krishna, and Penna River basins.

    Tap to read more about the Interstate River Water Disputes Act, 1956.

    Issues with the Project:

    • Violation of the AP Reorganisation Act (2014): Telangana claims that Andhra’s project infringes upon legal frameworks laid out during the bifurcation of the state.
    • Lack of Clearances: Telangana argues the project has not received mandatory approvals from:
      • Apex Council (Krishna River Management Board and Godavari River Management Board).
      • Central Water Commission (CWC).
    • Water Sharing: Telangana cites the Godavari Water Disputes Tribunal, which allocated 968 TMC to Telangana and 518 TMC to Andhra but did not quantify surplus water, making the legality of Andhra’s claim ambiguous.
    • Political Sensitivity: Water-sharing has historically been central to Telangana’s statehood movement; any diversion is seen as a betrayal of regional interests.
    • Ecological Concerns: The tunnel under the Nallamala forest may have environmental repercussions that have not been assessed or cleared.
    [UPSC 2012] Which of the following are included in the original jurisdiction of the Supreme Court? 1. A dispute between the Government of India and one or more States 2. A dispute regarding elections to either House of the Parliament or that of Legislature of a State 3. A dispute between the Government of India and a Union Territory 4. A dispute between two or more States

    Select the correct answer using the code given below:

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

     

  • Modern Indian History-Events and Personalities

    Who was Sree Narayan Guru (1856–1928)?

    Why in the news?

    The Prime Minister recently addressed a commemorative event marking 100 years of the historic conversation between Sree Narayana Guru and Mahatma Gandhi.

    About Sree Narayana Guru:

    • Early Life: Sree Narayana Guru was born on 22 August 1856 in Chempazhanthy, Kerala, into the Ezhava community, considered the so-called ‘avarna’ or outside the caste system.
    • Social Reform: He led a peaceful revolution against caste discrimination and promoted social equality and spiritual upliftment in Kerala.
    • Famous Slogan: Guru gave the powerful message — “One Caste, One Religion, One God for All”, calling for unity beyond caste or creed.
    • Spiritual Philosophy: A follower of Advaita Vedanta, he reinterpreted it to assert that divinity exists in every individual, regardless of caste.
    • Death and Legacy: He passed away on 20 September 1928, and his birth and death anniversaries are now observed as public holidays in Kerala and other states.

    His Contributions:

    • Temple Reform: In 1888, he consecrated a Shiva idol at Aruvippuram, challenging Brahminical control over temples.
    • Organisational Impact: He founded the Sree Narayana Dharma Paripalana (SNDP) Yogam in 1903, with Kumaran Asan as its first general secretary.
    • Social Movements: He supported the Vaikom Satyagraha (1924–25) against untouchability in public spaces.
    • Spiritual Centres: Guru established the Sivagiri Mutt (1904), which became the heart of the Sivagiri Pilgrimage (Theerthadanam).
    • Writings: His works, like Advaitha Deepika, Atmavilasam, Daiva Dasakam, and Brahmavidya Panchakam, reflect a spiritual and reformist vision.
    • Holistic Upliftment: He promoted education, cleanliness, agriculture, and handicrafts for self-reliance.
    • Against Conversions: Guru opposed religious conversion as a caste solution, favouring internal reform within Hindu society.

    His Conversations with Gandhiji (1925):

    • Historic Meeting: Mahatma Gandhi met Guru on 13 March 1925 at Sivagiri Mutt during the Vaikom Satyagraha.
    • On Scriptures: Guru clarified that Hindu texts do not support untouchability and backed the Vaikom movement fully.
    • On Salvation: He believed that all religions lead to moksha but stressed that material freedom is key to dignity.
    • Inclusive Ashrams: He shared that his ashrams welcomed all castes, with children studying and praying together.
    • View on Caste: While Gandhi defended varna in principle, Guru critiqued caste as rigid, anti-freedom, and regressive.
    • Mutual Respect: Gandhi was deeply moved and later praised Guru as a “holy soul”, calling Sivagiri a model of harmony.
    • Enduring Legacy: The meeting symbolised a blend of spiritual wisdom and social reform, with lasting national impact.
    [UPSC 2019] Consider the following pairs:

    Movement/Organization Leader

    1. All India Anti-Untouchability League Mahatma Gandhi 2. All India Kisan Sabha Swami Sahajanand Saraswati 3. Self-Respect Movement E. V. Ramaswami Naicker

    Which of the pairs given above is/are correctly matched?

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