Discussion
One of the following rivers has not developed a megafan :
Answer: C
The Chambal has not developed a megafan.
Megafans are huge fan-shaped bodies of sediment built where rivers leave a mountain front and spread over a subsiding plain. In the Ganga plain the Himalayan rivers Kosi and Gandak have built large megafans, and the Son, flowing north from the peninsular plateau, has built one on the southern side of the plain.
The Chambal flows north-east across the plateau of Malwa and the Vindhyan region in a deeply incised valley (with its famous ravines) and joins the Yamuna. It does not debouch onto a subsiding plain to build a megafan.
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