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
Pimvanserin is used in the treatment of 
Select and explain. 
A. Schizophrenia, B. Down's syndrome, C. Parkinsonism, D. Huntington's chorea
C: Parkinsonism
Answer: C: Parkinsonism 
Explanation: Pimvanserin is a 5HT2A blocker used to treat delusions and hallucinations in Parkinson's disease associated psychosis.