In which of the following rivers, the upper course contains fresh water but saline water flowing at the lower part?

సమాధానం చూపించు & వివరణ

సమాధానం: (B) Luni river

వివరణ

The Luni rises near Ajmer with fresh water, but becomes saline below Balotra as it crosses salt-bearing soils before ending in the Rann of Kutch.