Which of the following are the impacts of Global Warming? 1) Rise in sea level 2) Melting of glaciers 3) Spread of diseases 4) Bleaching of Coral reefs Select the correct answer using the codes given below.

All four are well-established impacts of global warming, so the answer is D. Warming oceans expand thermally and melting land ice adds water to them, raising sea levels. Glaciers in the Himalaya, Alps and Andes are retreating, which affects the rivers many Indian cities depend on. Warmer temperatures and changing rainfall widen the range of vectors such as Anopheles and Aedes mosquitoes, so malaria, dengue and chikungunya spread to new regions. Coral bleaching occurs when rising sea temperatures stress the symbiotic algae, which the coral expels, leaving the reef white and vulnerable.

• Statement 1: Correct. Thermal expansion plus ice sheet and glacier melt.
• Statement 2: Correct. Documented in IPCC assessments and Indian glacier studies.
• Statement 3: Correct. Climate change alters vector and pathogen ranges.
• Statement 4: Correct. Mass bleaching on the Great Barrier Reef in 2016 and 2017 is the standard example.

Core concept: climate change impacts on ecosystems, hydrology and human health. For Mains GS-III, connect this to adaptation and mitigation under the National Action Plan on Climate Change.

Trap: choosing C because candidates treat glacier melting as a cause rather than an impact, or doubt the disease link. The question asks for impacts, and every listed item is one.