Correct Option: A

Birbal had joined Akbar's Din-i-llahi. Akbar had started a religion called Din-i-llahi , which acknowledges Akbar as God' s representative on earth and had a combination of Hindu and Muslim beliefs. In the Ain-i-Akbari (The Institutes of Akbar), it is mentioned that Birbal was one of the few people other than Akbar who were its followers, besides being the only Hindu.