Correct Answer: Kanishka

Solution : The correct option is - Kanishka

The greatest Kushan leader who converted to Buddhism was Emperor Kanishka. Kanishka was a prominent ruler of the Kushan Empire, which existed from the 1st to the 3rd century CE in parts of Central Asia and South Asia. During his reign, Emperor Kanishka played a crucial role in promoting and patronizing Buddhism, and he is believed to have embraced the faith himself. He is particularly associated with the development of Mahayana Buddhism, one of the major branches of Buddhism, and his rule marked a period of significant Buddhist expansion and influence in the region.