What was the reason for the origin of the tripartite struggle? Which powers were involved in the struggle? Why was this struggle named so? 

Give one word to describe the value shown by the Rashtrakutas after reading the following. Famous Arabian historian and traveller Al Masudi was impressed by the Rashtrakutas and wrote:

There is none among the rulers of Hind (India) who respects the Muslims like Raja Balhara (Rashtrakuta King). In his kingdom, Islam is honoured and protected.