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': '114-biopterin (tetrahydrobiopterine) is required for metabolism of ? \nSelect and explain. \nA. Arginine, B. Lysine, C. Phenylalanine, D. Tryptophane', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Phenylalanine", 'role': 'assistant'}]