Option d is the correct answer. Patanjali, also known as Gonardiya or Gonikaputra, lived in the 2nd century BCE or 5th century CE. Therefore he was not contemporary of kanishka (c. 127-150 CE). Patanjali authored two significant Hindu works: the Yogasutras, classifying Yogic ideas into volumes like "Psychic Power" and "Samadhi," and the Mahabhashya, a defense of Panini's grammar against critics like Katyayana, refuting some of Panini's aphorisms. Ashvaghosha, Charaka, and Nagarjuna were all contemporaries of Kanishka and are associated with his court. Important Tips Important facts related to Kanishka: Kanishka's reign witnessed the division of Buddhism into Mahayana and Hinayana. He established the Shaka Era in A.D. 78. In his court, notable figures like Charaka and Sushruta were present. Kanishka invaded Patliputra and brought the Buddhist monk Asvaghosa to Purushpura. Kanishka was a strong supporter of Buddhism, convening the 4th Buddhist council in 78 AD at Kundalvana in Kashmir. The council was presided over by Vasumitra. During this event, Buddhist texts were collected, and commentaries were inscribed on copper sheets. Eminent scholars in Kanishka's court included Vasumitra, Asvaghosa, Nagarjun, Charaka, and Parsva. Kanishka engaged in a conflict against King Han Ho-ti of the Chinese Han dynasty. Eventually, he triumphed over the Chinese king in a second attempt.