Correct Answer: (a) Banas
Note: The Banas river is a tributary of the Chambal and also known as Van ki Asha or Hope of forest. This river originates in Khamnor Hills of the Aravalis near Kumbhalgarh in Rajsamand District and flows through the Mewar region. Major tributaries include the right bank tributaries of Berdach and Menali and the left bank tributaries of Kothari, Khari, Dai, Dheel River, Sohadara River, Morel and Kalisil.