This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycine Metabolism Detail, Subject name: Biochemistry
Glycine is used in the synthesis of all EXCEPT- 
Select and explain. 
A. Purines, B. Creatine, C. Heme, D. Pyrimidines
D: Pyrimidines
Answer: D: Pyrimidines 
Explanation: Glycine as Precursor of Many Compounds WITH REGARD TO OTHER OPTIONS For pyrimidines, two amino acids are required i.e. Aspaate and Glutamine.