The correct answer is: A. Samastipur
Pusa Agriculture University is located in Samastipur district of Bihar. It is one of the oldest agricultural universities in India. It was established in 1912 as Imperial Agricultural Research Institute. In 1929, it was renamed as Pusa Agricultural College. In 1960, it was upgraded to the status of university and renamed as Bihar Agricultural University. In 2005, it was renamed as Pusa Agriculture University.
The university offers undergraduate, postgraduate and doctoral programs in agriculture and allied sciences. It has a sprawling campus of over 1,000 acres. The university has a well-equipped library, laboratories, hostels, and sports facilities. It also has a number of research centers and extension centers.
The university has produced a large number of agricultural scientists and professionals. It has also made significant contributions to the development of agriculture in India.
The other options are incorrect because:
- Option B, Gaya, is a district in Bihar. However, Pusa Agriculture University is not located in Gaya.
- Option C, Araria, is a district in Bihar. However, Pusa Agriculture University is not located in Araria.
- Option D, Arwal, is a district in Bihar. However, Pusa Agriculture University is not located in Arwal.