The largest fresh water lake in Rajasthan –

Option (b) is correct because the largest fresh water in Rajasthan is Jaisamand. It is also sweet water lakes. It is India’s second largest artificial lake.

Option (a) is not correct because Rajsamand is also freshwater lake but not the largest fresh water lake in Rajasthan. It is located in Udaipur.

Option (c) is not correct because Sambhar Lake is India’s largest inland salt lake and it is located in southwest of Jaipur.

Option (d) is not correct because Pushkar Lake is described as Tirtha Raj, the king of all pilgrimage sites.