The river that is a reason of dispute between India and Bangladesh is the Teesta River. The Teesta River originates in the Himalayas and flows through both countries. The dispute arises from the sharing of water resources from this river. Both India and Bangladesh have different demands and concerns regarding the allocation of water from the Teesta River. This has led to ongoing negotiations and discussions between the two countries to try and reach a mutually beneficial agreement. The dispute has significant implications for irrigation, agriculture, and overall water security in the respective regions. It is important for both countries to find a resolution that ensures the equitable distribution of water resources and fosters cooperation between them.