The All India Congress Session in 1922, December was held in

Patna
Gaya
Bhagalpur
Champaran

The correct answer is A. Patna.

The All India Congress Session in 1922, December was held in Patna. The session was presided over by C.R. Das. The main resolution passed at the session was the Non-Cooperation Resolution. The resolution called for a boycott of British goods and institutions. The session also saw the launch of the Non-Cooperation Movement.

The other options are incorrect. Gaya is a city in Bihar, India. Bhagalpur is a city in Bihar, India. Champaran is a district in Bihar, India.