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': 'Richard Hanha syndrome is caused by defective metabolism of: \nSelect and explain. \nA. Lysine, B. Arginine, C. Tyrosine, D. Glycine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Following transamination, the carbon skeleton of tyrosine is degraded to fumarate and acetoacetate. Metabolic diseases of tyrosine catabolism include tyrosinosis, Richner-Hanha syndrome, neonatal tyrosinemia, and alkaptonuria. Ref: Harper 28th edition, chapter 29.', 'role': 'assistant'}]