The correct option is C the land between two rivers
Doab means the land between two converging rivers. Do means two and ab means water. The regions of the doabs near the rivers consist of low-lying, floodplains which are more fertile than the higher lying land away from the rivers. Some of the well known doabs are Yamuna-Ganga doab, Sindh Sagar doab, Jech doab, Raichur doab, etc.