Question Detail
Question
Select the odd one out.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Uracil, Cytosine, and Thymine are all pyrimidine bases (single-ring structure). Guanine is a purine base (double-ring structure).
Hint
Which one has a double-ring structure (purine) while the others have a single ring (pyrimidines)?