Which of the following nucleotides [NOO-klee-uh-tyds] is not derived from pyrimidine [py-RIM-i-deen]?

W) Uracil [YOOR-uh-sil]

X) Thymine [THY-men]

Y) Guanine [GWAH-neen]

Z) Cytosine [SY-tuh-seen]
Y) GUANINE