RAS question
Which of the following rivers does NOT originate from the Aravalli Range?
Correct answer: (B) Chambal.
The Chambal does not originate from the Aravalli Range; it rises in the Vindhyan range near Mhow in Madhya Pradesh.
Explanation
Chambal is the odd one out because its source is outside the Aravalli system. It originates in the Janapav Hills near Mhow in Madhya Pradesh, in the Vindhya Range. India-WRIS Wiki describes the Chambal, the biggest tributary of the Yamuna, as rising in the Vindhyan range near Mhow in Indore district of Madhya Pradesh. That makes Chambal different from the other listed rivers. Banas, Luni and Sahibi are Aravalli-origin rivers, so they do not satisfy the negative wording of the question. The key is to read the question as an origin-range test, not as a Rajasthan-flow test.
Why the other options are wrong
- (A) Luni is not the answer because it is an Aravalli-origin river, so it matches the group the question asks you to exclude from.
- (C) Banas is wrong because it originates in the Khamnor hills of the Aravalli range and is therefore an Aravalli-origin river.
- (D) Sahibi is wrong because it belongs with the rivers that originate from the Aravalli Range.
Concept
This tests Rajasthan drainage geography, especially the source ranges of major rivers. The recurring exam trap is to separate Aravalli-origin rivers from the Chambal, whose source is tied to the Vindhyan range near Mhow.