Q: 104 (CDS-I/2011)

Which of the following best explain why the lower course of a river is sometimes choked with sediments?
1. The valley of a river is widest in its lower course.
2. The velocity of a river in its lower course is low.
3. The delta sometimes develops in a rivers lower course.
4. Much of the river water is drawn for irrigation in the lower course.

Select the correct answer using the code given below : Code :
question_subject: 
Geography
question_year: 
2011
question_exam: 
CDS-I
stats: 
0,488,640,344,72,488,224