The correct answer is: Mihira Bhoja.
Mihira Bhoja was the most powerful Gurjara-Pratihara king. He ruled from 836 to 885 CE. He was a great conqueror and extended his kingdom from the Himalayas to the Narmada River. He was also a patron of learning and the arts.
The epithet Srimad-Adivaraha means “the great and first conqueror.” It was given to Mihira Bhoja by his court poets.
Mahipala I was the Gurjara-Pratihara king who ruled before Mihira Bhoja. He ruled from 815 to 836 CE. He was a powerful king, but he was not as successful as Mihira Bhoja in expanding his kingdom.
Devapala was the Gurjara-Pratihara king who ruled after Mihira Bhoja. He ruled from 885 to 907 CE. He was not as powerful as Mihira Bhoja, and he lost much of the territory that Mihira Bhoja had conquered.
Mahendrapala I was the Gurjara-Pratihara king who ruled before Mahipala I. He ruled from 770 to 815 CE. He was a powerful king, but he was not as successful as Mihira Bhoja in expanding his kingdom.