Explanation:

Until 1864, Gaya was a part of the district of Behar and Ramgarh (now in the state of Jharkhand). It became a district of Bihar in its own right on 3 October 1865. In May 1981, the Bihar state government created the Magadh division, comprising the district of Gaya, along with Nawada, Aurangabad and Jehanabad, all of which had originally been sub-divisions when Gaya district was created. Aurangabad and Nawada were partitioned from the territory of Gaya in 1976; and Jehanabad in 1988. Gaya district occupies an area of 4,976 km2 (1,921-mile2).