The correct option is D Amoghavarsha
Amoghavarsha wrote Kaviraja Margam and Ratnamalika. Amoghavarsha was a Rashtrakuta emperor, the greatest ruler of the Rashtrakuta dynasty, and one of the great emperors of India. Kaviraja Margam is the earliest available work on rhetorics , poetic and grammar in the Kannada language. some historians claim it is based partly on the Sanskrit text Kavyadarsha. Ratnamalika also known as prashnottara Ratnamalika a religious work in Sanskrit.