which base is found only in dna?\nadenine\nguanine\ncytosine\nthymine

Brief Explanations:

DNA has four bases - adenine (A), guanine (G), cytosine (C), and thymine (T). RNA has adenine, guanine, cytosine, and uracil (U) instead of thymine. Thymine is unique to DNA.

Answer:

thymine