Assertion: Pyramid of energy may be upright or inverted.
Reason :Only 20% of energy goes to next trophic 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.
