Shankaravarman was the ruler of which hill state?

The correct answer is C. Kashmir.

Shankaravarman was the ruler of Kashmir from 883 to 902 CE. He was a member of the Utpala dynasty. He was a powerful and successful ruler who expanded the kingdom of Kashmir. He was also a patron of the arts and literature.

Trigarta was a region in the Punjab region of India. It was ruled by the Trigarta kings.

Gujara was a region in the northwestern part of India. It was ruled by the Gurjara-Pratihara dynasty.

None of the above is not the correct answer.