Which base is found only in dna?
a)adenine
b)guanine
c)cytosine
d)thymine

Thymine.

Aenine and Guanine is found in RNA as well as DNA.

I hope this helped. ;3

The answer is c i just finished taking the test

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.