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
[{'content': 'Which amino acid is not present in creatine \nSelect and explain. \nA. Arginine, B. Methionine, C. Glycine, D. Lysine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Creatine doesn't contain lysine, other 3 amino acids are part of creatine.", 'role': 'assistant'}]