Arrange the following tributaries of Ganges from north to south as they meet Ganges.

1. Ghagra

2. Son

3. Gandak

4. Kosi

a. 1,2,3,4

b. 2,3,1,4

c. 1,3,2,4

d. 3,2,4,1

ANSWER: 1,2,3,4

Explanation:

1. Ghagra - Confluence with the Ganges at Doriganj in Bihar.

2. Son - Join the Ganges just above Patna.

3. Gandak - Confluence with the Ganges at Sonepur, Bihar.

4. Kosi - Joins the Ganga River 30 km west of Manihari, Bihar.