The correct answer is: B. 52
At the end of 1995, the number of districts in Bihar was 52. This number was increased to 53 in 2000 with the creation of Araria district. It was further increased to 54 in 2005 with the creation of Purnia district. The number of districts in Bihar remained at 54 until 2011, when it was increased to 57 with the creation of 3 new districts: Buxar, Bhabua, and Kaimur. The number of districts in Bihar has remained at 57 since then.
Option A is incorrect because it states that the number of districts in Bihar was 55 at the end of 1995. This is not correct. The number of districts in Bihar was 52 at the end of 1995.
Option B is correct because it states that the number of districts in Bihar was 52 at the end of 1995. This is correct.
Option C is incorrect because it states that the number of districts in Bihar was 50 at the end of 1995. This is not correct. The number of districts in Bihar was 52 at the end of 1995.
Option D is incorrect because it states that the number of districts in Bihar was none of the above. This is not correct. The number of districts in Bihar was 52 at the end of 1995.