Correct Option: B

The eminent Buddhist writers Nagarjuna, Asvaghosha, Parsva and Vasumitra flourished at the court of Kanishka. Nagarjuna was the great exponent of Mahayana doctrine and Asvaghosha, a multifaceted personality, was known as a poet, musician, scholar and zealous Buddhist monk. Charaka, the most celebrated authority on Ayurveda was the court physician of Kanishka and Mathara, a politician of rare merit, was his minister. Vasumitra presided over the fourth Buddhist Council.