Assertion : In a food chain, members of successive higher levels are fewer in number.
Reason : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.

• A

  If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

• B

  If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

• C

  If the Assertion is correct but Reason is incorrect.

• D

  If both the Assertion and Reason are incorrect.