Which purine and pyrimidine bases are present in `DNA` and `RNA`?

Options

A. (cytosine, thymine) and (uracil, guanine)
B. cytosine, thymine) and (uracil, adenine)
C. (cytosine, uracil) and (adenine, guanine)
D. (cytosine, thymine) and (adenine, guanine)

Answer

D

Explanation

Four different cyclic amine bases are found in `DNA`: adenine `(A)` and guanine `(G)`, which contain the purine ring system, and cytosine `(C )` and thymine `(T)`, which contains the pyrimidine ring system.
Adenine, guanine, and cytosine aslo occur in `RNA`, but thymine is replaced in `RNA` by a related pyrimidine base called uracil,