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
Drugs used in schizophrenia include: 
Select and explain. 
A. Chlorpromazine, B. Haloperidol, C. Olanzapine, D. All
D: All
Answer: D: All 
Explanation: A i.e. Chlorpromazine; B i.e. Haloperidol; C i.e. Olanzepine