Q1. Which river basin of Rajasthan is in second position in terms of water availability?
Explanation
In Rajasthan's river-basin classification by water availability, Banas Basin is treated as the second-ranking basin, so it is the keyed answer. Mahi Basin is significant in southern Rajasthan and has good flow compared with many arid basins, but it is not the second position asked here. Luni Basin covers a large western arid tract, yet its water availability is relatively limited and seasonal. Sabarmati Basin has only a smaller Rajasthan share, so it does not fit the second-rank position in the state's water-availability comparison.
