A) uracil
B) guanine
C) adenine
D) cytosine
Correct Answer: A
Solution :
Deoxyribonucleic acid (DNA) contains two types of nitrogenous base Purines \[\to \] Adenine and guanine Pyrimidine \[\to \] Thymine and cytosine RNA also consist of same base pairs except thymihe, in place of which uracil is present.
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