Which is the main river system of Bihar?

Correct answer: (b) Ganga

Explanation

Bihar is drained mainly by the Ganga river system. The Ganga flows west to east across the middle of the state, dividing it into north and south Bihar, and almost all its rivers join it:

• from the north: the Ghaghra, Gandak, Burhi Gandak, Bagmati, Kamla and Kosi;
• from the south: the Karmanasa, Son, Punpun and Kiul.