(A) In double helical structure of DNA, cytosine pairs with guanine with three hydrogen bonds.
(R) Cytosine contains one primary amine group, one secondary amine group and one keto group.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

B