In which of the following districts of Rajasthan are the ‘Barchans’ found?

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Accepted Answer

Step-by-step explanation:

1. Definition: Barchans are crescent-shaped sand dunes formed by unidirectional winds in arid regions with limited sand supply.

2. Occurrence: In India, these dunes are typical of the Thar Desert region. The Thar Desert is largely in western Rajasthan.

3. District identification: Of the given districts,
   - $ (2)$ Jaisalmer lies in the heart of the Thar Desert and is famous for sand dunes including barchans.
   - $ (1)$ Udaipur, $ (3)$ Bhilwara and $ (4)$ Alwar are not part of the active sandy desert region where barchans form.

4. Conclusion: Therefore barchans are found in Jaisalmer only, i.e., option corresponding to "2 only."

FINAL_ANSWER: b

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