Correct option is D
•This fertile region has historically been important for agriculture and settlement, especially in states like Uttar Pradesh.
•There are several Doabs in the Indo-Gangetic Plain, named after the rivers they lie between, such as the Bist Doab (Beas–Sutlej), Rechna Doab (Ravi–Chenab), and Bari Doab (Beas–Ravi) in the Punjab region.
• Doabs are crucial to Indo-Gangetic agriculture.
• Punjab literally means "land of five rivers," consisting of several doabs.
• These regions support intensive irrigation and cropping systems.