Explanation:
. Uracil is absent in DNA. In DNA, thymine is present in place of uracil and as the name says deoxyribo, an \(\mathrm{OH}\) group is absent in the \(2^{\text {nd }}\) position of ribose sugar.
\(D N A \rightarrow\) Adenine, guanine, cytosine, thymine.
RNA \(\rightarrow\) Adenine, guanine, cytosine, uracil.