Posted by: Pdfprep Category: USMLE Tags: USMLE certification, USMLE exam questions, USMLE practice exam Post Date: November 28, 2020 Pdfprep2020-11-28T11:38:04+00:00 Which of the following is not considered a pyrimidine?A . CB . TC . UD . G View Answer Answer: D Author Pdfprep