Multiple choice

The most plausible explanation of the location of the Thar desert in Western India is

  1. the obstruction caused by the Aravallis to the rainbearing wind that proceeds to the Ganga Valley.

  2. The evaporation of moisture by heat

  3. The absence of mountains to the north of Rajasthan to cause orographic rainfall in it.

  4. That the moisture carried by the south-west monsoon is driven away by the dry upper air current.

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C Correct answer
Explanation

The Thar Desert exists because the Aravalli Range lies parallel to the path of the moisture-bearing Southwest Monsoon winds. Because there are no high mountains perpendicular to the winds to force them to rise and cool (orographic rainfall), the moisture passes over the region without precipitating.

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