The correct option is D He was the first emperor of the Gupta dynasty.
Chandra Gupta I was the first ruler of the Gupta dynasty to adopt the grand title of Maharaj-adhiraja, a title that Samudragupta also used. His great grandfather and grandfather are mentioned simply as maha-rajas. It seems as if the family gradually rose to importance. Chandra Gupta I can be considered as the first emperor of the Gupta dynasty. However, the Gupta dynasty was founded by Sri Gupta.