Correct option is B
The correct answer is: (B) Palas, Gurjara-Pratiharas and Rashtrakutas
The tripartite struggle for Kannauj refers to the power struggle that took place in the 9th and 10th centuries for control of the city of Kannauj in northern India.
The three main contenders were:
The Palas (ruled in Bengal and Bihar),
The Gurjara-Pratiharas (ruled in northern India, particularly Rajasthan),
The Rashtrakutas (ruled in the Deccan, particularly in Karnataka and Maharashtra).
These three dynasties fought for dominance over Kannauj, which was a highly strategic and prosperous city.
The Palas, under Dharmapala and Devapala, initially controlled Kannauj.
The Gurjara-Pratiharas, led by Mihira Bhoja, also contested for the city, leading to conflicts with the Palas.
The Rashtrakutas, under rulers like Dantidurga and Krishna I, attempted to gain control over Kannauj in the 9th century, marking the struggle as tripartite.
This struggle weakened all three powers and allowed other emerging regional powers to gain influence in the region.