Lonar Lake is a crater lake located in the Buldhana district of Maharashtra, India. It was formed around 50,000 years ago when a meteorite hit the Earth`s surface, creating a large crater. Over time, this crater filled with water, forming the Lonar Lake.
Option 2, Sambhar Lake, is not a crater lake. It is a saltwater lake located in Rajasthan and is the largest inland saltwater lake in India.
Option 3, Chilika Lake, is also not a crater lake. It is a brackish water lake located in Odisha and is known for its rich biodiversity and bird population.
Option 4, Vembanad Lake, is the largest lake in Kerala and is not a crater lake. It is a backwater lagoon formed by the action of the sea waves and the currents of rivers flowing into it.
Therefore, the correct answer is option 1, Lonar Lake, as it is the only option that represents a crater lake in India.