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Assertion(A)    :    Increase in carbon dioxide would melt polar ice. 

Reason (R)      :    Global temperature would rise

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

Answer: A

Correct answer: Both A and R are true and R is the correct explanation of A.

Carbon dioxide traps outgoing infrared radiation, so more of it in the atmosphere raises the global temperature - and warmer air and oceans are what melt the polar ice. The rise in temperature is the mechanism linking the two. Both are true and R explains A.

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