Bihar Research Society was established in which year in Bihar?

The correct answer is: A. 1905

The Bihar Research Society was established in 1905 by a group of scholars and educationists, including Sir Asutosh Mukherjee, Sir Jadunath Sarkar, and Sir Rajendra Prasad. The society’s objective is to promote research in the history, culture, and languages of Bihar. It has published a number of books and journals on these subjects.

Option B is incorrect because the Bihar Research Society was established in 1905, not 1915.

Option C is incorrect because the Bihar Research Society was established in 1905, not 1925.

Option D is incorrect because the Bihar Research Society was established in 1905, not 1935.