Correct Option (B)
Dantidurga founded the Rashtrakuta Empire in the mid-8th century CE. He overthrew the Chalukyas of Badami, thereby establishing Rashtrakuta rule in the Deccan region and laying the foundation for its prominence.
Incorrect Options
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Amoghavarsha I was a distinguished Rashtrakuta ruler known for his patronage of literature and arts, but he was not the founder of the empire.
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Dhruva was a later and powerful Rashtrakuta ruler who significantly expanded the empire's territories and influence, but he did not found the empire.
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Krishna I was a successor of Dantidurga and is notably credited with the construction of the monolithic Kailasanatha Temple at Ellora, but he did not found the empire.