Who is the last king of Karnataka?

Answer: Option C

Harisimhadeva also called Hari Singh Deva who was the last ruler of the Karnat dynasty. He ruled from 1304 to 1324. His rule is considered a landmark point for the history of Mithila. He introduced several social changes such as the 4-class system for Maithil Brahmin and the Panji system was developed.