In which of the following Indian rivers is the upper course fresh water, but the lower course turns saline?

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

Which one of the following rivers is NOT the part of Indian Ganga river basin?

Which one of the following Indian cities is not located on a river bank?

Which of the following rivers of India is older than the Himalayas?

Which of the following is the largest river basin in Peninsular India?