Assertion (A) : In a food chain members of successive higher levels are fewer in number.
Reason (R ): 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 true and the reason is a correct explanation of the assertion.
B. If both assertion and reason are true but reason is not a correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.
