The first sitting of Bihar Legislature Council was convened at ………….

The correct answer is C. Bankipore.

The Bihar Legislative Council is the upper house of the Bihar Legislature, the state legislature of Bihar, India. It was established in 1937. The first sitting of the Bihar Legislative Council was convened on 20 February 1937 at Bankipore, which is now known as Patna.

The other options are incorrect. Purnea is a city in the Indian state of Bihar. Nalanda is an ancient city in the Indian state of Bihar. Gaya is a city in the Indian state of Bihar.