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Assertion (A): The lee side of a mountain range is drier than the windward side.
Reason (R): Air descending the lee slope warms and its relative humidity falls.

  • A.A is true but R is false
  • B.A is false but R is true
  • C.Both A and R are true, and R is the correct explanation of A
  • D.Both A and R are true, but R is not the correct explanation of A

Answer: C

Both are true and the reason gives the mechanism, and the effect is strengthened because much of the moisture has already been removed on the way up. Two effects work in the same direction. Moisture loss and warming both dry the air.

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