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

Type: Prelims Only

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

    Doomsday Glacier Destabilisation and the Future of Antarctic Ice Sheets

    Why in the News?

    A recent scientific study has revealed increasing fracturing in the Thwaites Glacier, also known as the Doomsday Glacier, indicating how large parts of the Antarctic ice sheets could collapse in the future. The findings were published in the Journal of Geophysical Research: Earth Surface.

    Thwaites Glacier (Doomsday Glacier)

    The Thwaites Glacier is a massive glacier in West Antarctica that drains ice from the West Antarctic Ice Sheet into the Amundsen Sea. It is one of the fastest changing glacier systems on Earth.

    Why it is called the Doomsday Glacier

    • Complete collapse could raise global sea levels by about 65 cm
    • Acts as a gateway glacier whose destabilisation can trigger wider ice sheet collapse
    • Focus area: Thwaites Eastern Ice Shelf (TEIS), a floating extension of the glacier

    Pinning point and shear zone

    • TEIS is attached to an undersea ridge called a pinning point
    • Pinning points slow ice flow but also cause compression and fracturing
    • Upstream of the pinning point lies a shear zone where ice deforms intensely

    Fracture patterns observed

    • Ice fracturing occurred in two stages
      • Long fractures parallel to ice flow
      • Smaller fractures perpendicular to ice flow
    • Annual fracture length increased sharply
      • From about 165 km in 2002
      • To about 335 km in 2022

    Consequences of fracturing

    • Breakdown of the shear zone accelerates ice flow
    • Faster ice flow increases ice discharge into the ocean
    • Raises risk of destabilisation of the entire West Antarctic Ice Sheet

    Prelims Pointers

    • Thwaites Glacier is located in West Antarctica
    • Known as the Doomsday Glacier due to sea level rise potential
    • Complete melt could raise sea levels by about 65 cm
    • Study used satellite and GPS data over two decades
    • West Antarctic Ice Sheet is a global climate tipping element
    [2021] With reference to the water on the planet Earth, consider the following statements: 

    1. The amount of water in the rivers and lakes is more than the amount of groundwater

    2. The amount of water in polar ice caps and glaciers is more than the amount of groundwater

    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

  • Roads, Highways, Cargo, Air-Cargo and Logistics infrastructure – Bharatmala, LEEP, SetuBharatam, etc.

    India Becomes First Nation to Commercially Produce Bio Bitumen

    Why in the News?

    India has become the first country in the world to commercially produce bio bitumen, according to Union Minister for Road Transport and Highways Nitin Gadkari. The announcement highlights India’s push towards sustainable infrastructure and green alternatives in road construction.

    Bio Bitumen

    Bio bitumen is an eco friendly binding material used in road construction. It is produced from renewable biological sources instead of petroleum based crude derivatives.

    Raw materials used

    • Vegetable oils
      • Crop stubble and agricultural residue
      • Other forms of organic and agro waste

    Economic significance

    • With 15 percent blending, India can save nearly ₹4,500 crore in foreign exchange
      • Lowers import bill for petroleum based bitumen
      • Opens new income streams for farmers through agro waste supply
      • Generates rural employment and livelihood opportunities

    Prelims Pointers

    • India is the first nation to commercially produce bio bitumen
      • Bio bitumen is made from renewable biological sources
      • Used in road construction as a binding material
      • Helps reduce stubble burning and crude oil imports
      • Contributes to circular economy and sustainable development
    [2011] In the Union Budget 2011-12, a full exemption from the basic customs duty was extended to the bio-based asphalt (bioasphalt). What is the importance of this material? 

    1. Unlike traditional asphalt, bio-asphalt is not based on fossil fuels

    2. Bioasphalt can be made from non-renewable resources

    3. Bioasphalt can be made from organic waste materials

    4. It is eco-friendly to use bioasphalt for surfacing of the roads

    Select the correct answer using the code given below: 

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

  • Foreign Policy Watch: India-Bangladesh

    India Bangladesh Ganga Water Sharing Treaty (1996)

    Why in the News?

    Senior officials from the Union Jal Shakti Ministry visited Farakka Barrage as the India–Bangladesh Ganga Water Sharing Treaty is set to expire in December 2026, ahead of renewal discussions between India and Bangladesh.

     About 

    • A bilateral treaty governing the sharing of Ganga (Ganges) river waters between India and Bangladesh during the dry season, with regulated releases at Farakka Barrage in West Bengal
    • Signed on 12 December 1996
    • Valid for 30 years
    • Renewable by mutual consent
    • Downstream monitoring at Hardinge Bridge in Bangladesh

    Background

    • Dry season water disputes date back to the 1950s
    • Interim arrangements were signed in 1977, 1982, and 1985
    • The 1996 treaty introduced a stable, rule based and long term framework for cooperation

    Key features

    • Ten day sharing schedule (January to May): Water allocation based on a formula using historical average flows from 1949 to 1988
    • Low flow consultation clause: If river flow falls below 50,000 cusecs in any ten day period, immediate bilateral consultation is required
    • Minimum release assurance: India ensures downstream releases, allowing limited withdrawals up to 200 cusecs for reasonable uses between Farakka and the Bangladesh border
    • Joint Committee mechanism: Equal representation from both countries. Daily monitoring at Farakka and Hardinge Bridge. Annual reports on implementation and dispute resolution
    • Review and renewal: Review every five years or earlier if necessary. Renewal only by mutual agreement.
    [2017] With reference to river Teesta, consider the following statements: 

    1. The source of river Teesta is the same as that of Brahmaputra but it flows through Sikkim. 

    2. River Rangeet originates in Sikkim and it is a tributary of river Teesta

    3. River Teesta flows into Bay of Bengal on the border of India and Bangladesh

    Which of the statements given above is/ are correct? 

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

  • International Space Agencies – Missions and Discoveries

    White dwarf system

    Why in the News?

    NASA’s Imaging X-ray Polarization Explorer (IXPE) has, for the first time, probed the internal structure of a white dwarf binary system by studying X ray polarisation. Observations of EX Hydrae revealed unexpected details about gas flows, magnetic accretion, and reflected X ray emission.

    Significance of IXPE observations

    • Enabled estimation of the height of hot accretion columns.
    • Detected X rays reflected off the white dwarf surface, a first for such systems.
    • Provided direct evidence to test theories of accretion physics, magnetic fields, and extreme states of matter.

    White Dwarf System

    A white dwarf system usually consists of a white dwarf and a companion star bound in a binary system. Matter from the companion is pulled towards the white dwarf due to its strong gravity.

    How it forms

    • A Sun like star exhausts nuclear fuel and sheds outer layers as a planetary nebula.
    • The leftover dense core becomes a white dwarf.
    • In binary systems, gas from the companion star accretes onto the white dwarf.
    • EX Hydrae belongs to a class called intermediate polars, where a moderate magnetic field partially disrupts the accretion disc and channels gas along magnetic field lines.

    Key characteristics

    • Extreme density: Mass comparable to the Sun, radius similar to Earth.
    • Degenerate matter: Supported by electron degeneracy pressure based on the Pauli Exclusion Principle, not fusion.
    • High energy emissions: Infalling gas heats to tens of millions of degrees, producing X rays.
    • Magnetic accretion: Gas flows in columns rising thousands of kilometres above the surface.
    • Chandrasekhar limit: Maximum stable mass about 1.4 times the Sun.

    Prelims Pointers

    • IXPE studies X ray polarisation, not imaging alone.
    • EX Hydrae is an intermediate polar type white dwarf system.
    • Accretion driven X ray emission occurs due to magnetic channeling.
    • White dwarfs are supported by electron degeneracy pressure.
    [2009] Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die? 

    (a) Edwin Hubble 

    (b) S. Chandrashekhar 

    (c) Stephen Hawking 

    (d) Steven Weinberg

  • Digital India Initiatives

    [8th Jaunary 2026] The Hindu OpED: Natgrid, the search engine of digital authoritarianism

    PYQ Relevance

    [UPSC 2023] What are the internal security challenges being faced by India? Give out the role of Central Intelligence and Investigative Agencies tasked to counter such threats.

    Linkage: NATGRID represents the technological backbone of intelligence coordination among central agencies. The question allows analysis of how intelligence reforms post-26/11 rely increasingly on data integration, while raising concerns of accountability and oversight.

    Mentor’s Comment

    This article examines the transformation of India’s intelligence architecture through the National Intelligence Grid (NATGRID). It evaluates how a system conceived after the 26/11 terror attacks for intelligence coordination is evolving into a large-scale, algorithm-driven surveillance infrastructure. The piece raises constitutional, institutional, and ethical concerns relevant to internal security, governance, civil liberties, and democratic accountability.

    Introduction

    Conceived as a technological “crown jewel,” NATGRID aimed to enable seamless intelligence coordination. However, its evolution from a post-crisis intelligence grid into a population-wide surveillance architecture marks a fundamental shift in India’s security-liberty balance.

    Why in the News?

    NATGRID has re-emerged as a major policy concern due to recent reports highlighting its expanded operationalisation, widening user base, and integration with the National Population Register (NPR). Intelligence access has shifted from post-event investigation to real-time, algorithmic risk assessment. The scale is unprecedented, around 45,000 queries per month, extended to state police officers down to the Superintendent of Police rank, marking a sharp departure from earlier centralised intelligence control. This expansion occurs without a statutory framework or independent oversight, raising fears of institutionalised mass surveillance and digital authoritarianism.

    Why did NATGRID emerge after 26/11?

    1. Intelligence Fragmentation: Identified failure to synthesise scattered inputs such as visa records, travel itineraries, hotel stays, and financial trails related to David Headley.
    2. Post-Crisis Imperative: Positioned as a technological fix to prevent future terror attacks through real-time data aggregation.
    3. Institutional Expansion: Envisioned as middleware enabling 11 central agencies to query databases across 21 categories, spanning identity, travel, telecom, finance, and assets.

    How did NATGRID evolve institutionally?

    1. Administrative Clearance: Operationalised through executive decisions rather than Parliamentary legislation.
    2. Delayed Rollout: Long gestation period led to perceptions of “vapourware” until post-2020 acceleration.
    3. Operational Activation: Publicly announced in 2009; cleared in 2012 without statutory safeguards; rebranded under Mission Mode Project “Horizon.”

    What scale of intelligence access does NATGRID now enable?

    1. Query Volume: Handles approximately 45,000 intelligence queries per month.
    2. User Expansion: Access widened beyond central agencies to state police officers up to SP rank.
    3. Routine Policing Shift: Intelligence access integrated into everyday law enforcement rather than exceptional counter-terror operations.

    Why does integration with NPR mark a structural break?

    1. Population Mapping: NPR data includes demographic, biometric, residential, lineage, and identity details.
    2. Function Creep: Converts a population register into an intelligence query platform.
    3. Paradigm Shift: Moves intelligence from tracking discrete events to continuous surveillance of individuals.
    4. Political Sensitivity: NPR’s linkage with NRC debates amplifies concerns of profiling and citizenship filtering.

    How does algorithmic policing change the nature of surveillance?

    1. Entity Resolution: Deployment of “Gandiva,” an analytics engine capable of linking fragmented datasets to identify individuals.
    2. Predictive Risk Assessment: Uses facial recognition, KYC databases, and driving licence records.
    3. Inference at Scale: Algorithms determine intent based on pattern recognition rather than human judgment.
    4. Bias Amplification: Existing social biases embedded in data risk reinforcing caste, religious, and geographic profiling.

    Why is lack of oversight a central concern?

    1. Absence of Statute: No dedicated law governing scope, limits, or accountability of NATGRID.
    2. Judicial Gap: Legality of large-scale intelligence surveillance remains unadjudicated despite pending cases.
    3. Clerical Overload: Tens of thousands of monthly requests undermine meaningful scrutiny.
    4. Autonomous Surveillance: Weak Parliamentary oversight allows self-justifying intelligence architectures.

    Why does the argument of “intelligence necessity” fall short?

    1. Operational Failures: 26/11 highlighted deficits in training and ground-level policing, not data scarcity.
    2. Over-Reliance on Technology: Intelligence failures often stem from institutional silos, not lack of databases.
    3. False Positives Risk: Automated “hits” can trigger irreversible harm without due process.
    4. Learning Deficit: Local police lacked firearm training during 26/11 despite intelligence availability.

    What constitutional values are at stake?

    1. Privacy Erosion: Expansive surveillance contradicts proportionality standards laid down in privacy jurisprudence.
    2. Due Process Deficit: Automated suspicion undermines presumption of innocence.
    3. Chilling Effect: Normalisation of surveillance reshapes citizen-state relations.
    4. Judicial Precedent: Reliance on Justice K.S. Puttaswamy (Retd.) v. Union of India (2017) contrasts with unchecked surveillance growth.

    Conclusion

    NATGRID reflects a decisive shift in India’s internal security architecture from intelligence coordination to continuous, technology-driven surveillance. While conceived to prevent failures like 26/11, its expansion in scale, scope, and access, without a clear statutory framework or independent oversight, raises fundamental concerns about privacy, proportionality, and democratic accountability. Intelligence systems that rely on algorithmic inference and population-wide data integration risk normalising suspicion and eroding constitutional safeguards. Effective counter-terrorism requires not only technological capability but also institutional accountability, legal clarity, and professional capacity-building. Without these correctives, NATGRID risks functioning less as a preventive security instrument and more as an enduring infrastructure of digital authoritarianism.

  • Agmark, Hallmark, ISI, BIS, BEE and Other Ratings

    79th Foundation Day of Bureau of Indian Standards 

    Why in the News?

    The 79th Foundation Day of the Bureau of Indian Standards was celebrated, where the Union Minister highlighted BIS’s transition from a regulatory role to a facilitative and enabling institution, aligned with ease of doing business and promotion of a quality culture.

    Bureau of Indian Standards

    • India’s National Standards Body
    • Responsible for standardisation, certification, hallmarking, and quality assurance
    • Protects consumer interests and enhances global competitiveness of Indian products

    Establishment and Legal Framework

    • Established in 1987
    • Came into force on 1 April 1987
    • Governed by the BIS Act, 2016
    • Headquarters at New Delhi

    Historical Evolution

    • 1947 Indian Standards Institution established
    • 1952 to 1956 ISI Certification Marks Scheme launched
    • 1987 ISI transformed into BIS with expanded mandate
    • 2016 BIS Act strengthened consumer participation and international alignment

    Significance

    • Strengthens quality infrastructure in India
    • Supports Make in India and export competitiveness
    • Promotes consumer safety and trust
    • Aligns Indian standards with global best practices

    Prelims Pointers

    • BIS is India’s national standards authority
    • ISI mark originated before BIS
    • BIS Act 2016 expanded consumer role
    • Hallmarking is mandatory for precious metals
    • Digital standardisation is a recent reform focus
    [2017] Consider the following statements: 

    1. The Standard Mark of Bureau of Indian Standards (BIS) is mandatory for automotive tyres and tubes

    2. AGMARK is a quality Certification Mark issued by the Food and Agriculture Organisation (FAO)

    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

  • Promoting Science and Technology – Missions,Policies & Schemes

    Indian Scientists Simulate Mpemba Effect Using Supercomputers 

    Why in the News?

    Indian scientists have developed the first supercomputer powered simulation to successfully capture the Mpemba effect, the counterintuitive phenomenon where hot water freezes faster than cold water. The achievement was announced by the Ministry of Science and Technology.

    What is the Mpemba Effect

    • A physical phenomenon in which hot water freezes faster than colder water under certain conditions
    • Named after Erasto Mpemba, a Tanzanian student who reported the effect in the 1960s
    • Long considered a scientific paradox due to lack of a complete theoretical explanation

    Key Findings

    • Simulation successfully reproduced the Mpemba effect in water
    • Demonstrated that the effect can also occur in fluid to solid phase transitions beyond water
    • Confirms that non equilibrium thermodynamics plays a crucial role in freezing dynamics

    Scientific Significance

    • Resolves a long standing physical paradox through computational physics
    • Enhances understanding of phase transitions and heat transfer
    • Opens new avenues in materials science and condensed matter physics
    • Shows the power of supercomputing in theoretical and experimental validation

    Institutional Context

    • Research supported by India’s advanced scientific infrastructure
    • Aligns with national efforts in computational science, physics research, and supercomputing missions

    Prelims Pointers

    • The Mpemba effect refers to the faster freezing of hot water compared to cold
    • The phenomenon lacks a single universal explanation
    • Supercomputer simulations help study processes at atomic and molecular scales
    • The effect may exist in systems other than water
    [2011] The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason? 

    (a) Ice is a bad conductor of heat

    (b) Since the surface of the lake is at the same temperature as the air, no heat is lost

    (c) The density of water is maximum at 4°C

    (d) None of the statements (a), (b) and (c)

  • Railway Reforms

    Indian Railways Becomes World’s Largest Electrified Rail

    Why in the News?

    Indian Railways has become the largest electrified rail network in the world, with about 99.2 percent of its broad gauge network electrified as of November 2025.

    About Indian Railways Electrification Achievement

    • Indian Railways is India’s national transporter and one of the world’s largest railway networks
    • It has achieved near complete electrification of its broad gauge routes
    • The milestone was achieved under Mission 100 percent Railway Electrification

    Background

    • Railway electrification in India began in 1925
    • Mission mode acceleration started after 2014

    Objectives of Mission 100 percent Railway Electrification

    • Eliminate diesel traction
    • Shift to clean electric traction
    • Reduce carbon emissions and air pollution
    • Lower fuel import dependence
    • Improve speed, reliability, and operational efficiency

    Key Features and Data

    • About 99.2 percent of nearly 70,000 route kilometres electrified
    • Electrification speed increased from
      1.42 km per day during 2004 to 2014
      More than 15 km per day during 2019 to 2025
    • 25 States and Union Territories fully electrified
    • Only around 0.8 percent network remains non electrified

    Renewable Energy Integration

    • Solar capacity increased from 3.68 MW in 2014 to about 898 MW in 2025
    • Supports cleaner traction and lower operational emissions
    • Aligns with India’s renewable energy and climate goals

    Technological Advancements

    • Use of Automatic Wiring Trains
    • Mechanised Overhead Equipment foundation systems
    • Faster and safer electrification with reduced manual intervention
    [2025] Consider the following statements: 

    I. Indian Railways have prepared a National Rail Plan (NRP) to create a future ready railway system by 2028

    II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany. 

    III. ‘Kavach’ system consists of RFID tags fitted on track in station section. 

    Which of the statements given above are not correct? 

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

  • New Species of Plants and Animals Discovered

    Remarkable New Species Discovered in India in 2025

    Why in the News?

    In December 2025, Indian scientists announced the discovery of multiple new species across diverse ecosystems, ranging from the Eastern Himalayas to the Western Ghats, highlighting India’s rich and still underexplored biodiversity.

    Key New Species Discovered

    Bridgeoporus kanadii

    Type: Macro fungi
    Discovery region: West Kameng district, Arunachal Pradesh
    Habitat: Old growth Abies fir trees
    Key features:

    • Thick, leathery and massive fruiting body
    • Extremely sturdy, capable of bearing human weight
      Significance:
    • Indicates high fungal diversity in Eastern Himalayan forests
    • Highlights ecological value of old growth conifer ecosystems

    Rhinophis siruvaniensis

    Type: Non venomous shieldtail snake
    Family: Uropeltidae
    Discovery region: Siruvani Hills, Kerala, Western Ghats
    Key features:

    • Fossorial or burrowing lifestyle
    • Specialized tail shield for digging and protection
      Significance:
    • Adds to endemic reptile diversity of the Western Ghats
    • Reinforces the region as a global biodiversity hotspot

    Neelus sikkimensis

    Type: Springtail or Collembola
    Discovery region: High altitude cold desert soils of Sikkim, Eastern Himalayas
    Key features:

    • Wingless arthropod with a jumping organ called furcula
    • First record of the genus Neelus in India
      Significance:
    • Identified by Zoological Survey of India
    • Global species count of Neelus expanded to eight
    • Indicates biodiversity even in extreme cold environments

    Parasynnemellisia khasiana

    Type: Fungus
    Taxonomy: Completely new genus and species
    Discovery region: Khasi Hills near Mawsynram, Meghalaya
    Habitat: Dense bamboo forests in ultra high rainfall zones
    Key features:

    • Grows in association with bamboo ecosystems
    • Adapted to one of the wettest regions on Earth
      Significance:
    • Demonstrates unexplored microbial diversity of Northeast India

    Dolomedes indicus

    Type: Fishing spider
    Discovery region: Wayanad and Lakkidi, Western Ghats, Kerala
    Key features:

    • Semi aquatic spider
    • Can skate on water surfaces
    • Hunts aquatic insects and small fish

    Significance:

    • First confirmed fishing spider species in India
    • Highlights freshwater dependent arthropod diversity

    Ophiorrhiza mizoramensis

    Type: Flowering shrub
    Family: Rubiaceae or coffee family
    Discovery region: Murlen National Park, Mizoram
    Key features:

    • Grows up to one metre
    • Dark purplish pink tubular flowers
    • Unique stigma lobe structure

    Conservation status:

    • Provisionally assessed as Critically Endangered
    • Fewer than 200 mature individuals recorded

    Overall Significance

    • Confirms India as a megadiverse country
    • Highlights importance of Eastern Himalayas and Western Ghats
    • Strengthens case for habitat conservation and taxonomy research
    • Shows climate resilient and niche specific species evolution

    Prelims Pointers

    • Western Ghats and Eastern Himalayas are global biodiversity hotspots
    • New genus discovery indicates unexplored fungal diversity
    • High altitude ecosystems also host unique micro fauna
    • Many new species face immediate conservation threats
    [2022] With reference to ‘Gucchi’ sometimes mentioned in the news, consider the following statements: 

    1. It is a fungus. 

    2. It grows in some Himalayan forest areas

    3. It is commercially cultivated in the Himalayan foothills of north-eastern India

    Which of the statements given above is correct? 

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

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

    1000 Years of Survival of Somnath Temple 

    Why in the News?

    The Prime Minister of India highlighted the thousand year survival of the Somnath Temple, marking 1,000 years since the 1026 CE attack by Mahmud of Ghazni.

    Somnath Temple

    • One of the 12 sacred Jyotirlingas of Lord Shiva
    • Revered across Hindu tradition
    • Known as the Eternal Shrine due to repeated destruction and reconstruction

    Location

    • Prabhas Patan, near Veraval, Saurashtra region of Gujarat
    • Located on the Arabian Sea coast
    • At the Triveni Sangam of Kapila, Hiran, and Saraswati rivers

    Historical Significance

    Ancient Origins

    • Mentioned in Shiva Purana
    • Evidence of worship since antiquity
    • Multiple reconstructions in pre medieval times

    1026 CE Event

    • Temple attacked and plundered by Mahmud of Ghazni
    • Considered a major historical rupture in Indian history

    Medieval Period

    • Rebuilt by rulers such as Kumarapala of the Chaulukya dynasty
    • Reconstructed under Chudasama kings
    • Destroyed again during Sultanate invasions

    Symbol of Resilience

    • Historical records indicate the temple was destroyed six times
    • Rebuilt after every destruction
    • Became a symbol of civilisational continuity and faith

    Architectural Features

    • Built in Chaulukya or Solanki style
    • Prominent shikhara and richly carved stone walls
    • Garbhagriha houses the Jyotirlinga
    • Famous inscription stating no landmass lies between Somnath and the South Pole, symbolising cosmic alignment

    Modern Reconstruction

    Post Independence Revival

    • Reconstruction initiated in 1947
    • Led by Vallabhbhai Patel as a civilisational responsibility
    • Designed by architect Prabhashankar Sompura using traditional methods

    Inauguration

    • Inaugurated on 11 May 1951
    • By Rajendra Prasad
    • Despite the political debates of the period

    Present Management

    • Managed by the Somnath Trust
    • Trust is chaired by the Prime Minister of India
    [2022] The Prime Minister recently inaugurated the new Circuit House near Somnath Temple at Veraval. Which of the following statements are correct regarding Somnath Temple? 

    1. Somnath Temple is one of the Jyotirlinga shrines. 

    2. A description of Somnath Temple was given by Al-Biruni

    3. Pran Pratishtha of Somnath Temple (installation of the present-day temple) was done by President S. Radhakrishnan. 

    Select the correct answer using the code given below: 

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