Which of the following is the largest coastal lagoon in India?

To determine the largest coastal lagoon in India, we must first understand what a coastal lagoon is. A coastal lagoon is a shallow body of water separated from the ocean by a barrier such as a sandbar or barrier island, and it is typically brackish (a mix of salt and fresh water). Now, let's evaluate the options: Sambhar Salt Lake: This is an inland salt lake located in Rajasthan. It is not connected to the sea and is not a coastal lagoon.