Assertion :- Base pairing between puring and pyrimidines allows uniform distance between two strands of the helix.
Reason : Number of hydrogen bonds between pairing bases are constant.
A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.