Correct Option: D

Vishnugopa was the ruler of Kanchi during the time of Samudragupta. In the southern Pallava kingdom of Kanchipuram, he defeated king Vishnugopa, then restored him and other defeated southern kings to their thrones on payment of tribute. Several northern kings were uprooted however, and their territories added to the Gupta empire. At the height of Samudragupta's power, he controlled nearly all of the valley of the Ganges (Ganga) river and received homage from rulers of parts of east Bengal, Assam, Nepal, the eastern part of the Panjab, and various tribes of Rajasthan.