Largest saline water lake in India is

1. A

   Chilka

   Chilka (Chilika) is India’s largest coastal lagoon and a famous brackish-water wetland in Odisha. It is not classed as the largest inland saline lake in the sense this question keys. This option is not the key.

2. B

   Sambhar

   Sambhar is the official key as the largest saline water lake in India. It is an inland salt lake in Rajasthan, used for salt production and recognised as a major saline wetland. Among the four names, Sambhar is the largest inland saline lake, so (b) is correct.

3. C

   Lonar

   Lonar is a crater lake in Maharashtra, saline to alkaline, but far smaller than Sambhar. This option is therefore wrong.

4. D

   Wullar

   Wullar (Wular) in Jammu and Kashmir is among India’s largest freshwater lakes, not a saline lake. This option is not the key.

Summary. Official key is (b) Sambhar. Sambhar in Rajasthan is India’s largest inland saline lake. Chilika is a vast brackish lagoon, Lonar a small crater lake, and Wular a freshwater lake. The question’s stored key treats Sambhar as the largest saline water lake. Only (b) is correct.