Assertion : Cyclis pathway of photosythesis first apperead in some eubacterial species.
Reason Oxygen started accumulating in the atmosphere after the nonj-cyclic pathway of photosynthesis evolved.
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.
D. If the assertion is true but reason is false.
