Answer: Tripura
Notes: Tripura is home to the Khowai and Gumti Rivers, which are significant for the region's ecology and water management. The Khowai River, originating from the Atharamura Hills, spans 70 kilometers before merging with the Kushiyara River. The Gumti River, flowing for 95 kilometers, starts at Dumur, crosses into Bangladesh, and ultimately joins the Meghna River, which leads to the Bay of Bengal.
