This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Creatine is made up of all, except ? 
Select and explain. 
A. Glycine, B. Alanine, C. Methionine, D. Arginine
B: Alanine
Answer: B: Alanine 
Explanation: Ans. is 'b' i.e., Alanine