Which one of the following biosphere reserves comprises islands with e

Which one of the following biosphere reserves comprises islands with estuaries, beaches, coral reefs, salt marshes and mangroves ?

Sunderban biosphere reserve
Gulf of Mannar biosphere reserve
Nilgiri biosphere reserve
Nandadevi biosphere reserve
This question was previously asked in
UPSC CDS-2 – 2021
The correct option is B) Gulf of Mannar biosphere reserve.
The Gulf of Mannar Biosphere Reserve is located in the southeastern tip of India and encompasses a chain of 21 islands, coral reefs, estuaries, seagrass beds, and mangroves along the coastline. It is one of the most ecologically sensitive regions in India.
The Sunderban Biosphere Reserve is primarily known for its vast mangrove forests and deltaic region. The Nilgiri Biosphere Reserve is located in the Western Ghats and is primarily a terrestrial ecosystem of forests and grasslands. The Nandadevi Biosphere Reserve is in the Himalayas and is known for alpine ecosystems. Only the Gulf of Mannar uniquely comprises the mix of islands, estuaries, beaches, coral reefs, salt marshes, and mangroves described.