Select the option that is related to the third term in the same way as the second term is related to the first term.

Madhya Pradesh : Bhopal :: Rajasthan : ?

​​The relationship between Madhya Pradesh and Bhopal is that Bhopal is the capital city of Madhya Pradesh. Similarly, we need to find the capital city of Rajasthan. The capital of Rajasthan is Jaipur.

So, the correct answer is Jaipur.

Thus, correct option is (a).