💥Join UPSC 2027,2028 Mentorship (August Batch) + XFactor Notes & Microthemes PDF

GS Paper: GS3-18.Conservation, Environmental Pollution and Degradation, Environmental Impact Assessment.

  • Egyptian Cotton Leafworm (A Moth Species)

    Why in the News?

    A moth species called Egyptian cotton leafworm can hear sounds emitted by stressed plants, a study confirmed.

    About the Egyptian Cotton Leafworm

    Details
    • Scientific name: Spodoptera littoralis.
    • Polyphagous pest affecting crops like cotton, tomatoes, maize, tobacco, and peppers.
    • Found across tropical and subtropical regions in Africa, Middle East, and South Asia.
    • The moth has been spreading to new areas due to climate change.
    • Larvae damage crops by feeding on leaves, stems, and flowers, reducing crop yield and quality.
    Findings of the Study
    • Female moths use plant acoustic emissions (sound clicks) to decide where to lay eggs.
    • These sounds, undetectable to humans, help the moths identify healthier, hydrated plants for egg-laying.
    • Moths avoid stressed, dehydrated plants that produce stress-related sounds.
    Impact on Agriculture
    • Harmful in cotton-growing regions.
    • Larvae cause significant damage to a variety of crops, particularly cotton, tomatoes, and tobacco, impacting the quality and quantity of the produce.

    PYQ:

    [2014] Which of the following statements is / are correct regarding vegetative propagation of plants?

    1. Vegetative propagation produces clonal population.

    2. Vegetative propagation helps in eliminating the virus.

    3. Vegetative propagation can be practiced most of the year.

    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

  • Eurasian Little Gull spotted in Delhi for first time

    Why in the News?

    For the first time, the Eurasian Little Gull was spotted in the National Capital Region (NCR) near Sultanpur National Park at Chandu.

    About the Eurasian Little Gull:

    Details
    Overview and Physical Characteristics
    • Scientific Name: Larus minutus
    • Common Name: Eurasian Little Gull
    • Size: 30-33 cm in length, wingspan 75-85 cm; Weight: 70–150 grams
    Habitat and Features
    • Breeding Habitat: Marshy wetlands, shallow freshwater lakes, and estuaries in Northern Eurasia (Russia, Eastern Europe).
    • Winter Migration: Offshore waters, coastal areas, and estuaries around the Mediterranean Sea, Black Sea, and Caspian Sea.
    • Migratory Pattern: Migrations from northern breeding grounds to warmer regions in winter.
    Conservation Status
    • Conservation Status: Classified as Least Concern by the IUCN Red List.
    • Rare sightings of the species in India, particularly inland regions like NCR.

     

    PYQ:

    [2020] With reference to India’s biodiversity Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are-

    (a) Birds

    (b) Primates

    (c) Reptiles

    (d) Amphibians

  • India got its 58th Tiger Reserve

    Why in the News?

    • Ratapani Wildlife Sanctuary in Madhya Pradesh has become India’s 57th tiger reserve after receiving approval from the Union Ministry of Environment, Forest, and Climate Change.
      • Madhav National Park also received approval to be declared a tiger reserve, which will make it India’s 58th tiger reserve after the official notification.

    About Ratapani Tiger Reserve and Madhav Tiger Reserve:

    Ratapani TR Madhav TR
    Location
    • Raisen district, Madhya Pradesh, Vindhya Range, 50 km from Bhopal;
    • 824 sq km (318 sq mi) total area.
    • Shivpuri district, Madhya Pradesh, near the Madhav National Park;
    • 354.85 sq km (137.3 sq mi) total area.
    History
    • Established as Wildlife Sanctuary in 1976.
    • Designated as Tiger Reserve on 2 Dec 2024
    • It was initially a national park.
    • Designated as Shivpuri National Park in 1956.
    • Renamed as Madhav National Park in 1959 after Madho Raj Scindia, Maharaja of Gwalior.
    Flora and Fauna
    • Biome: Dry and moist deciduous forests, 55% covered with teak.
    • Fauna: Tigers, leopards, spotted deer, sloth bear, wild boar, sambar, jackals, wild dogs.
    • Water Bodies: Barna Reservoir, Ratapani Dam, seasonal streams.
    • Biome: Dry deciduous forests with significant scrub and grasslands.
    • Fauna: Tigers, leopards, spotted deer, sloth bear, wild boar, sambar, jackals, wild dogs.
    • Water Bodies: Sindh River, Pitakhal Lake, and seasonal streams.

     

    Why and when did the first Tiger Reserve come up in India?

    • A tiger reserve is a protected area created under the Project Tiger initiative launched in 1973 by the Indian government to protect tigers and their natural habitats.
    • A TR is administered by the National Tiger Conservation Authority.
    • These reserves are a part of the conservation efforts to ensure the survival of tigers, preserve biodiversity, and maintain ecological balance.
      • The first TR in India was the Corbett Tiger Reserve in Uttarakhand, established in 1973. It was also the first national park to be part of the Project Tiger initiative.
    • Key Features of a Tiger Reserve:
      • Core Area: A core area is designated as a national park or sanctuary, where human activity is restricted to protect the wildlife.
      • Buffer Area: Surrounding the core area, the buffer zone consists of a mix of forest and non-forest land, used for controlled human activity while ensuring wildlife conservation. These buffer zones serve as transitional areas for wildlife, providing essential corridors for movement.

     

    PYQ:

    [2020] Among the following Tiger Reserves, which one has the largest area under “Critical Tiger Habitat”?

    (a) Corbett

    (b) Ranthambore

    (c) Nagarjunsagar-Srisailam

    (d) Sunderbans

  • Nilphamari narrow-mouthed frog

    Why in the News?

    A study highlights that endemic frog species, like the Nilphamari narrow-mouthed frog (Microhyla nilphamariensis), face challenges due to habitat loss and land use changes in agroforestry habitats like orchards and paddy fields.

    About the Nilphamari narrow-mouthed frog:

    Details
    About A species of narrow-mouthed frog, characterized by a small size, narrow triangular mouth, and reduced webbing between toes.

    It has light brown dorsal coloration with a dark brown diamond-shaped marking.

    (Not listed by either IUCN or CITES.)

    Geographical Location Found in Bangladesh, India, Nepal, and northern Pakistan.
    Habitat and Challenges Prefers moist environments like grassy fields near ephemeral pools.

    Faces challenges due to habitat loss and land use changes, particularly in agroforestry areas like orchards and paddy fields.

  • [4th December 2024] The Hindu Op-ed: Reflections on Baku’s ‘NCQG outcome’

    PYQ Relevance:
    Q)  Describe the major outcomes of the 26th session of the Conference of the Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCCC). What are India’s commitments at this conference? (UPSC CSE 2021)

    Mentor’s Comment:  UPSC Mains have focused on India’s changing policy towards climate change (2022) and COP26 (2021).

    The recent UN Climate Change Conference (COP29) held in Baku, Azerbaijan, concluded with significant yet contentious outcomes, particularly regarding the New Collective Quantified Goal (NCQG) for climate finance. This editorial reflects on the implications of the NCQG and the broader context of climate negotiations.

    This editorial content can be used to present the significance of ‘Climate finance for developping countries’ and the challenges associated at Global stage.

    _

    Let’s learn!

    Why in the News?

    COP29 dubbed the “Finance COP,” was expected to deliver an ambitious outcome on the NCQG (New Collective Quantified Goal on Climate Finance). However, it fell short by neglecting equitable burden-sharing and climate justice, overlooking the financial needs of the Global South.

    Why do the Developing countries need Finance for climate change? 

    • Upfront Costs of Clean Technologies: Renewable energy technologies often have high upfront costs, which require government support to make them affordable to consumers, especially in developing countries.
    • Long-term Benefits but High Initial Investment: While renewable technologies have lower long-term operational and fuel costs, the high initial investment remains a significant barrier.
    • Financial Gaps and Urgency: Developing countries need urgent upscaling of finance to meet transformational goals. The pressure on government resources is compounded by the need for fiscal prioritization toward development activities.
    • Debt Issues and Risk: High debt burdens in developing countries prevent them from accessing affordable capital, making it difficult to incentivize private investment in green technologies.
    • High Cost of Capital: Developing countries face much higher lending rates, limiting their ability to access financial markets at favourable rates for climate action.
    • International Support Needed: Finance from developed countries, particularly in the form of public grants instead of loans, is essential to support the transition to green energy in developing nations.

    What are the roles of the NCQG (New Collective Quantified Goal on Climate Finance)?

    • Origins and Rationale: The NCQG was designed to address the shortcomings of previous climate finance pledges, including the $100 billion annual commitment made at Cancun in 2010. The NCQG aims to establish clearer, more accountable climate finance goals.
      • NCQG aims to establish a new financial target post-2025 to support developing countries, succeeding the $100 billion annual commitment from developed nations.
    • Addressing Climate Finance Gaps: NCQG seeks to bridge climate finance gaps by ensuring both the quantity and quality of financial instruments meet developing nations’ needs.
      • By setting a collective goal, NCQG promotes trust and cooperation among nations to effectively implement the Paris Agreement.
    • Catalyzing Private Investment: NCQG encourages private sector investment by signalling stability and commitment to climate finance.
    • Supporting Climate Resilience: The goal help developing countries adapt to climate impacts and transition to low-carbon economies with necessary funding.
    • Upholding Principles of Equity: NCQG is grounded in Common but Differentiated Responsibilities (CBDR), ensuring tailored support for developing countries based on their specific needs and capacities.

    What are the challenges?

    • Financial Needs of Developing Countries: The UNFCCC’s Second Needs Determination Report estimated that $5 trillion to $7 trillion would be required by 2030 to meet the needs of 98 developing countries. Developing nations have requested $1.3 trillion annually by 2030.
    • Disappointing Outcome at COP29: Developed countries agreed to a $300 billion annual commitment by 2035, which is seen as insufficient compared to the needs of the developing world. This amount does not represent a significant shift in financial flows and falls short of transformative action.
    • Lack of Commitment to Climate Justice: The NCQG falls short in terms of equitable burden-sharing, failing to adequately recognize the financial needs of the global south and climate justice.

    Way forward: 

    • Increase Financial Commitments: Developed countries must significantly enhance their financial commitments, moving beyond the $300 billion annually agreed at COP29, and align with the $1.3 trillion requested by developing nations to meet urgent climate goals.
    • Ensure Equitable Burden-Sharing: Future climate finance discussions must prioritize climate justice, adhering to the principles of Common but Differentiated Responsibilities and Respective Capabilities (CBDR-RC), ensuring that developed countries take on a larger share of the financial burden.
    • Focus on Grants over Loans: Developed countries should provide more finance in the form of public grants rather than loans, addressing the debt burdens of developing countries and enabling them to invest in green technologies without further exacerbating fiscal constraints.

    https://www.thehindu.com/opinion/lead/schooling-in-india-in-times-of-poor-air-quality/article68918906.ece

  • How land degradation is threatening Earth’s capacity to sustain humanity?

    Why in the News?

    The UNCCD, a treaty addressing desertification and drought, partnered with Germany’s Potsdam Institute for Climate Impact Research to release an analysis ahead of COP16’s launch in Riyadh, Saudi Arabia.

    What is Land Degradation?

    Land degradation is defined by the United Nations Convention to Combat Desertification (UNCCD) as the “reduction or loss of the biological or economic productivity and complexity of rainfed cropland, irrigated cropland, or range, pasture, forest and woodlands” due to various pressures, including land use and management practices. This phenomenon results in diminished soil quality and productivity, affecting both ecosystems and human livelihoods.

    Why is it a Matter of Concern?

    Land degradation poses significant risks to both humans and ecosystems:

    • Water Insecurity: Land degradation exacerbates water scarcity and reduces access to safe water, leading to a higher incidence of water- and food-borne diseases.
      • The World Health Organization (WHO) reports that unsafe drinking water and inadequate sanitation lead to approximately 829,000 deaths per year from diarrheal diseases alone.
    • Food Security: It reduces the quality and quantity of food production, increasing malnutrition risks.
    • Health Risks: Degraded lands contribute to the spread of water- and food-borne diseases due to poor hygiene and lack of clean water. Respiratory issues can arise from soil erosion and dust.
    • Environmental Impact: Eroded soil carries fertilizers and pesticides into water bodies, harming aquatic life and communities dependent on these resources.
    • Climate Change: Healthy soils act as carbon sinks. Degradation leads to the release of stored carbon and nitrous oxide, exacerbating global warming. The report indicates that land ecosystems’ capacity to absorb human-caused carbon dioxide has decreased by 20% over the last decade.

    What is Causing Land Degradation?

    • Chemical Overuse: Excessive fertilisers and pesticides degrade soil; 50% of agricultural land suffers from nutrient depletion, salinisation, and waterlogging affecting 30% of irrigated lands globally.
    • Soil Erosion: Unsustainable farming practices lead to the loss of 24 billion tons of fertile soil annually, reducing crop yields by up to 50% in some regions.
    • Climate Change: Extreme weather events reduce global crop yields by 10%-50% by 2050; 12.6% of drylands were degraded between 1982-2015, affecting 213 million people.
    • Urbanization: Rapid urban growth of 1 million hectares per year destroys habitats, reduces farmland, and increases runoff, exacerbating soil erosion and biodiversity loss.
    • Deforestation and Overgrazing: 420 million hectares of forest lost since 1990; overgrazing degrades 34% of the global degraded area, weakening soil health and ecosystems.

    Which Areas are the Worst Affected?

    • Dry Regions: Areas such as South Asia, northern China, California (USA), and the Mediterranean are particularly vulnerable.
    • Global Context: Approximately 15 million square kilometers of land are already degraded an area larger than Antarctica with an additional million square kilometers degrading each year. A third of humanity lives in drylands, which encompass three-quarters of Africa.

    Way forward: 

    • Sustainable Land Management Practices: Promote eco-friendly agricultural methods, reforestation, and efficient irrigation to restore soil health, combat erosion, and improve water retention in degraded lands.
    • Global Collaboration and Policy Implementation: Strengthen international frameworks like the UNCCD, allocate resources for affected regions, and adopt policies that integrate land restoration with climate resilience and biodiversity conservation.

    Mains PYQ:

    Q  The process of desertification does not have climate boundaries. Justify with examples. (UPSC IAS/2020)

  • World Wildlife Conservation Day

    Why in the News?

    • World Wildlife Conservation Day (December 4) reminds us to focus on preserving and protecting the critically endangered species in India and globally.
      • The theme for this year is “Connecting People and Planet: Exploring Digital Innovation in Wildlife Conservation”.

    World Wildlife Conservation Day: Key Facts

    • Observed annually on December 4th.
    • Purpose: Raise awareness about the importance of wildlife conservation and the protection of endangered species and their habitats.
    • It was established in 2012 by the UN, coinciding with the anniversary of the 1948 signing of CITES (Convention on International Trade in Endangered Species).
    • It supports global efforts for wildlife conservation, aligns with SDG 15 (life on land) and SDG 14 (life below water).

    Aims for India’s Critically Endangered Species

    • As of 2022, 73 species in India are classified as critically endangered, meaning they are at highest risk of extinction in the wild.
      • The number of critically endangered species has risen from 47 in 2011, partly due to better data availability and monitoring.
    • India has 9 critically endangered mammal species, out of which 8 are endemic (found only in specific regions within India).
      • These include: Kashmir Stag (Hangul), Malabar Large-spotted Civet, Andaman Shrew, Jenkin’s Shrew, Nicobar Shrew, Namdapha Flying Squirrel, Large Rock Rat, and Leafletted Leaf-nosed Bat.
    • Though these animals receive significant attention for tourism purposes, they are only three of the critically endangered species in India.
      • Lions: Asiatic lions in the Gir Forest are critically endangered.
      • Tigers: Bengal tigers are also listed as critically endangered.
      • Cheetahs: They are also part of India’s endangered wildlife.
    • Great Indian Bustard is a bird facing significant threats due to power lines in Rajasthan.

    PYQ:

    [2014] The most important strategy for the conservation of biodiversity together with traditional human life is the establishment of:

    (a) biosphere reserves

    (b) botanical gardens

    (c) national parks

    (d) wildlife sanctuaries

  • Environment Ministry’s Lok Sabha reply shows 33.6% of India’s coastline is threatened by erosion

    Why in the News?

    During the ongoing Winter Session of Parliament, the Union Environment Ministry presented data shedding light on the critical issue of coastal erosion in India.

    What are the key findings of the report?

    • Extent of Coastal Erosion Nationwide:
      • 33.6% of India’s coastline has been affected by erosion over the past three decades.
      • 26.9% of the coastline has shown growth (accretion), while 39.6% remains stable.
    • Regional Variations in Karnataka:
      • Dakshina Kannada: The most severely affected district in Karnataka, with 48.4% of its 36.66 km coastline eroded (17.74 km).
      • Udupi: Reported 34.7% erosion of its 100.71 km coastline (34.96 km).
      • Uttara Kannada: Reported the lowest erosion, at 12.3% of its 175.65 km coastline (21.64 km).
    • Data and Methodology: The study, conducted by the National Centre for Coastal Research (NCCR), utilized satellite imagery and field surveys to monitor shoreline changes from 1990 to 2018.
    • Risk Identification and Mapping: The Indian National Centre for Ocean Information and Services (INCOIS) has prepared Multi-Hazard Vulnerability Maps (MHVM), incorporating data on extreme water levels, sea level rise, and shoreline changes to highlight areas prone to disasters like tsunamis and storm surges.

    What are the causes of coastal erosion in India?

    • Rising Sea Levels: Climate change has led to increased sea levels, which amplify storm surges and coastal flooding, significantly contributing to erosion.
    • Sand Mining and Infrastructure Projects: Unregulated sand extraction and construction activities, such as ports and seawalls, disrupt natural sediment flow, exacerbating erosion in vulnerable areas.
      • For example, illegal sand mining along the Bhagirathi-Hooghly River has reduced river channel width by up to 55%, significantly increasing erosion risks along the banks.
    • Mangrove Depletion: The loss of mangroves, which act as natural barriers against wave action, leaves coastlines more exposed to erosion. For instance, after Cyclone Gaja in 2019, Muthupet mangroves in Tamil Nadu lost nearly three square kilometres of coverage due to uprooted trees.
    • Cyclonic Activity: An increase in cyclonic events has destabilised coastal systems, further intensifying erosion. As per the  National Disaster Management Authority (NDMA) reported that 75% of the Indian coastline is susceptible to cyclones and related hazards.

    CASE STUDY: Mitigation Efforts in Karnataka

    • Shoreline Management Plan: The Karnataka government has developed this plan under the Coastal Regulation Zone (CRZ) Notification of 2019 to address coastal erosion effectively.
    • Karnataka Strengthening Coastal Resilience and Economy (K-SHORE) Project: Funded by the World Bank, this initiative aims to enhance coastal protection, improve community livelihoods, and tackle marine plastic pollution along Karnataka’s coast.
    • Multi-Hazard Vulnerability Maps (MHVM): Created by the Indian National Centre for Ocean Information and Services (INCOIS), these maps identify areas at risk from disasters like tsunamis and storm surges using data on shoreline changes and sea level rise.
    • Community-Driven Conservation Programs: Experts advocate for community involvement in conservation efforts, along with real-time monitoring of erosion using artificial intelligence for sustainable solutions.

    Why there is a need for a paradigm shift?

    • Ineffectiveness of Traditional Methods: Long-standing strategies like constructing concrete sea walls have proven ineffective over the past 30 years in preventing coastal erosion.
    • Recommendations Against Human Habitation: Engineers recommend restricting habitation in vulnerable areas to mitigate risks associated with coastal erosion; however, political interests often overshadow these warnings.
    • Investment in Sustainable Solutions: Environmental activists argue that funds currently allocated for traditional coastal structures would be better spent on creating safe townships away from vulnerable coastlines, ensuring community safety during extreme weather events.
    • Holistic Approaches Needed: A multi-faceted strategy involving ecosystem restoration (e.g., mangrove replantation), stricter regulation of sand mining, and innovative solutions like artificial reefs is essential for effective long-term management of coastal erosion issues.

    Way forward: 

    • Adopt Integrated Coastal Zone Management (ICZM): Implement holistic strategies combining ecosystem restoration, stricter regulations on sand mining, and innovative measures like artificial reefs and eco-friendly breakwaters to ensure long-term coastal resilience.
    • Promote Managed Retreat and Community Awareness: Relocate vulnerable communities to safer areas away from high-risk zones while fostering community-driven conservation efforts and leveraging real-time monitoring technologies like AI to mitigate erosion impacts effectively.

    Mains PYQ:

    Q  Explain the causes and effects of coastal erosion in India. What are the available coastal management techniques for combating the hazard? (UPSC IAS/2022)

  • International Centre for Integrated Mountain Development (ICIMOD)

    Why in the News?

    The ICIMOD has launched Air Quality Dashboard for Indo-Gangetic Plain.

    ICIMOD Air Quality Dashboard: Important Features

    • The dashboard provides real-time and forecasted air quality data for the region.
    • It uses a combination of ground sensor data and satellite imagery to give a comprehensive view of air pollution across local, sub-regional, and regional scales.
    • A dynamic timelapse powered by the Weather Research and Forecasting model with Chemistry (WRF-Chem) tracks the spread of PM2.5 across the region.
    • This model highlights the spread of pollution from hotspots like Lahore, New Delhi, and Kolkata.
    • It provides two-day forecasts, allowing communities, policymakers, and researchers to anticipate air quality conditions and take proactive measures.

    About the International Centre for Integrated Mountain Development (ICIMOD):

    Details
    • A regional intergovernmental learning and knowledge-sharing centre founded in 1981.
      • Idea of creating ICIMOD was first discussed at the International Workshop in December 1974.
    • 8 regional member countries of the Hindu Kush Himalaya (HKH) region: Afghanistan, Bangladesh, Bhutan, China, India, Myanmar, Nepal, and Pakistan.
      • HKH region encompasses mountain ranges, including the Hindu Kush, Himalayas, and Tibetan Plateau, extending from northern Afghanistan to Myanmar.
    Structural Mandate
    • Headquartered in Khumaltar, Lalitpur, and Kathmandu Valley, Nepal.
    • ICIMOD also has a Knowledge Park in Godavari, Lalitpur exhibiting ICIMOD’s research and field applications.
    • Country offices in Afghanistan and Pakistan.
    Functions and Powers
    • Collaborates with national and international scientific institutions, government agencies, donor agencies, and the private sector, both within the region and globally.
    • Key Role: Promotes partnerships among regional member countries to secure a better future for the people and environment of the HKH region.

     

    PYQ:

    [2012] When you travel in Himalayas, you will see the following:

    1. Deep gorges
    2. U-turn river courses
    3. Parallel mountain ranges
    4. Steep gradients causing land sliding

    Which of the above can be said to be the evidence for Himalayas being young fold mountains?

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

  • Gandhamardan Hills, Odisha

    Why in the News?

    The Odisha government has clarified that it will not allow bauxite mining in the Gandhamardan hills after concerns arose when the Adani Group’s subsidiary acquired 112 acres of land near the hills.

    Gandhamardan Hills, Odisha

    About Gandhamardan Hills:

    Geographical Features
    • Situated in the western part of Odisha, spread across the Bargarh and Bolangir districts.
    • Covers an area of 190 square kilometers.
    • Dense forests and hill slopes.
    • Plays a crucial role in sustaining the livelihoods of local communities.
    Mines and Minerals Found
    • Bauxite: Primary ore of aluminum.
    • Graphite: Used in industrial applications.
    • Manganese: Important for steel manufacturing.
    Significance Cultural Sites:

    1. Nrusinghanath Temple: A major pilgrimage site dedicated to Lord Nrusingha, a half-lion, half-human incarnation of Lord Vishnu.
    2. Harishankar Temple: Dedicated to Lord Shiva and Vishnu, set amidst picturesque surroundings.

    Hiuen Tsang described the hill shrine as a Buddhist heritage site named Parimalagiri in his chronicles.

    Flora: Rich in medicinal plants.
    Fauna: Rich biodiversity, including diverse wildlife species.

    Dasycarpa and spider peucetia harishankarensis are endemic to this hill.

    Declared as a Biodiversity Heritage Site (BHS) by the Odisha government in March 2023 (making 37th BHS in India).

     

    PYQ:

    [2015] Consider the following pairs :

    Place of Pilgrimage: Location

    1. Srisailam : Nallamala Hills

    2. Omkareshwar : Satmala Hills

    3. Pushkar: Mahadeo Hills

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

    (a) 1 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3