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: Psychiatry
[{'content': "Pimvanserin is used in the treatment of \nSelect and explain. \nA. Schizophrenia, B. Down's syndrome, C. Parkinsonism, D. Huntington's chorea", 'role': 'user'}, {'content': "Answer: C \nExplanation: Pimvanserin is a 5HT2A blocker used to treat delusions and hallucinations in Parkinson's disease associated psychosis.", 'role': 'assistant'}]