Which is the longest river of Pakistan? A) River Chenab B) River Jhelum C) River Indus D) River Hingol Related MCQs: According to the Indus Basin Treaty, the waters of the River Beas, River Ravi, and River Sutlej would be used by? Which is the longest river in Pakistan? The longest river in Pakistan is: …. is the longest river of Baluchistan province?