This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': '5 HIAA in urine is due to: \nSelect and explain. \nA. Pheochromocytoma, B. Carcinoid syndrome, C. Phenyl ketonuria, D. Alkaptonuria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Carcinoid syndromeIn Pheochromocytoma VMA is excreted in excess in urine.In Carcinoid syndrome 5 HIAA is excreted in excess in urine.In PKU Phenyl Ketones like Phenyl acetate and Phenyl Pyruvate is excreted in urine.In Alkaptonuria Homogentisate is excreted in urine.', 'role': 'assistant'}]