The correct answer is: b) Chutiya kingdom period.
The Bhismaknagar Fort is a ruined fort located in the Sonitpur district of Assam, India. It is believed to have been built during the Chutiya kingdom period, which lasted from the 13th to the 16th centuries. The fort is located on a hilltop overlooking the Brahmaputra River. It is surrounded by a moat and a wall. The fort is in a state of disrepair, but it is still an impressive sight.
The Chutiya kingdom was a Hindu kingdom that ruled over parts of Assam from the 13th to the 16th centuries. The kingdom was founded by the Chutiya dynasty, which was descended from the Kachari people. The Chutiya kingdom was a powerful kingdom, and it had a significant impact on the history of Assam.
The Bhismaknagar Fort was built by the Chutiya kings as a defensive stronghold. The fort was used to protect the kingdom from its enemies. The fort was also used as a royal palace.
The Bhismaknagar Fort is an important historical site. It is a reminder of the Chutiya kingdom and its legacy. The fort is also a popular tourist destination.