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': 'Creatinine is formed from : \nSelect and explain. \nA. Arginine, B. Lysine, C. Leucine, D. Histamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Glycine, arginine and methionine all paicipate in creatine biosynthesis', 'role': 'assistant'}]