The correct option is D 780-792
Dhruva ruled Rashtrakuta Empire within the period 780-792 CE. Dhruva was one of the most notable rulers of the Rashtrakuta Empire. He ascended the throne after replacing his elder brother Govinda II. He defeated the Vatsaraja of the Gurjara Prathihara Empire,and Dharmapala of the Pala Empire of Bengal in a battle in the Ganges - Yamuna doab.