Option c is the correct answer. Chandragupta-II was the third emperor of the Gupta dynasty and the son of Samudragupta. He ruled from c. 380 to c. 415 CE and expanded the Gupta Empire to its greatest extent. He was also a patron of art, literature, and religion. He adopted the title of 'Parama Bhagawat', which means 'the supreme devotee of Vishnu'. He was a follower of Vaishnavism, a sect of Hinduism that worships Vishnu as the supreme god. He also issued coins depicting himself as Vishnu's avatar, Lord Krishna. The title of 'Parama Bhagawat' was also used by his successors, such as Kumargupta-I and Skandagupta.