Correct Option: C

Separated from the Bay of Bengal by a narrow spit, Chilika is one of India's largest brackish water coastal lakes. Located south of the mouth of the Mahanadi River in unspoilt Odisha, this lake was once a bay of the ocean until it was silted up by monsoon tides. The lake is an important habitat and breeding ground for both resident and migratory and aquatic birds, most notably flamingoes.