He is considered to be one of the greatest kings in the Indian history and is considered to be in the lines of Emperor Ashoka. He is also the greatest king of the Kushan dynasty. He is also believed to have originated the Mahayana sect of Buddhism. Who am I talking about?

Kanishka (c. 127-150 CE) was the greatest Kushan ruler, famous for his military conquests, patronage of Buddhism (hosting the Fourth Buddhist Council), and role in developing Mahayana Buddhism. Vikramaditya (B) is legendary, often associated with the Gupta era. Harshavardhana (C) ruled much later (7th century CE). Krishna (D) is a deity, not a Kushan king.