Option b is the correct answer. Sarvavarman was a 6th-century grammarian who wrote the Katantra, a treatise on Sanskrit grammar. The work is a simplified and concise version of the Ashtadhyayi, the foundational text of Sanskrit grammar, composed by Panini. Sudraka was a playwright who wrote the Mrichchhakatika, a Sanskrit-language play. The play is a romantic comedy that depicts the love story of Charudatta, a poor Brahmin, and Vasantasena, a rich courtesan. Vijnaneshvara was a 12th-century jurist. He wrote the Mitakshara, a commentary on the Yajnavalkya Smriti. It is a Sanskrit-language law book attributed to Yajnavalkya, an ancient sage and lawgiver. Kalhana was a 12th-century historian who wrote the Rajatarangini, a Sanskrit-language chronicle of the kings of Kashmir.