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
A patient of depression is getting chlorpromazine, but his auditory hallucination is not controlled. The next drug given is - 
Select and explain. 
A. Haloperidol, B. Clozapine, C. Sulpiride, D. Tianeptin
B: Clozapine
Answer: B: Clozapine 
Explanation: The patient is taking chlorpromazine, i.e., the patient is taking treatment for schizophrenia. Auditory hallucinations are not controlled, therefore he is having resistant schizophrenia for which clozapine is the drug of choice.
Don't get confused with depression (as written in question) because depression may occur in schizophrenia. If It would have been depression patient would have been taking antidepressants not antipsychotics.
So, this patient is suffering from schizophrenia with associated depression.