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Assertion (A): Sea level in the western Pacific is normally higher than in the east.
Reason (R): The trade winds push surface water westward and it accumulates there.

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

Answer: B

Both are true and the reason gives the mechanism, and the difference of about half a metre is one of the quantities that changes markedly during an El Nino event. The trades do the piling. Half a metre of difference is typical.

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