The correct answer is (a) Bhimtal.
Bhimtal is a lake in the Kumaon region of Uttarakhand, India. It is located at an altitude of 2,042 meters (6,700 feet) and is surrounded by hills. The lake is a popular tourist destination and is known for its scenic beauty. It is also a popular spot for boating and fishing.
The lake was recently included under the National Lake Conservation Project (NLCP). The NLCP is a government initiative to conserve and restore lakes in India. The project aims to improve the water quality of lakes, reduce pollution, and protect the biodiversity of lake ecosystems.
The other options are incorrect because they are not lakes. Pulicat Lake is a lagoon located in Tamil Nadu and Andhra Pradesh, India. Ooty is a town in the Nilgiri Hills of Tamil Nadu, India. Sambhar Lake is a salt lake located in Rajasthan, India.