Answer: D
Correct answer: Wular Lake
Wular Lake in Jammu and Kashmir is the largest freshwater lake in India, fed by the Jhelum. It is a natural flood-absorption basin for the Kashmir valley and is designated a Ramsar site of international importance. The distractors are all significant lakes of other kinds, which is what makes the question worth care. Chilika in Odisha is the largest brackish water lagoon in India and the second largest coastal lagoon in the world, famous for its migratory birds and Irrawaddy dolphins. Vembanad in Kerala is the longest lake in India, part of the backwater system, and also brackish. Sambhar in Rajasthan is the largest inland saline lake and a major source of salt. Reading the qualifier - freshwater, saltwater, lagoon, longest, largest - is what separates these four, and examiners rely on it. Wular has shrunk considerably through siltation and encroachment.