Answer : 2. "Sambhar "
Explanation :

1. Sambhar Lake: This is a saltwater lake located near Jaipur city in Rajasthan state of India. This lake is situated at an altitude of 1,200 feet above sea level.

2. Sambhar Salt Lake is the largest brackish lake in India and the source of most of Rajasthan's salt production.

3. It produces 196,000 tons of clean salt every year.

4. Which is about 9% of India's salt production.