The correct option is C Keibul Lamjao National Park
Afloat on the waters of the Loktak Lake in Manipur, the Keibul Lamjao National Park is the world’s only floating wildlife sanctuary. Known for the patches and rings of biomass called phumdis, the park is a wetland ecosystem. A phumdi is a carpet of dead and decaying flora, which floats on the surface of the lake—about a fifth of it is above the surface. Tall reeds and grasses grow on these phumdis, often reaching up to 15ft in height.