This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs & Other Biological Methods of Treatment, Subject name: Psychiatry
[{'content': 'HIAA is a metabolite of: \nSelect and explain. \nA. Serotonin, B. Dopamine, C. Epinophrine, D. Histamine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e. SerotoninSerotonin or 5 hydroxytryptamine is catabolized to 5 Hydroxy indole acetic acid (5HIAA).The enzyme which catalyzes this reaction is - Monoamine oxidase.5 HIAA is excreted normally in urine. Normal adult excretes about 7 mg of HIAA per day.", 'role': 'assistant'}]