Correct Answer: (c) 2, 3, 4
Solution:After the death of Harsha, Kannauj was the centre of attraction for various powerful dynasties. It was compared with Magadha during the Gupta period. In order to control the territory, Pala, Gurjar Pratihara and Rashtrakuta started a tripartite struggle, which has been described as a most important event in the history of North India during the 8-9 century. Finally, Pratihars came out as the winner.