Correct Answer: Loktak

Solution : The correct option is Loktak.

Loktak Lake, located in the northeastern state of Manipur, is known as the only floating island lake in the country. It is famous for its unique phumdis, which are masses of vegetation, soil, and organic matter that float on the surface of the lake. These phumdis are often referred to as floating islands because they can be large enough to support vegetation and even human settlements.