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
Drug not used in prophylaxis of bipolar disorder ? 
Select and explain. 
A. Haloperidol, B. Lithium, C. Carbamazepine, D. Valproate
A: Haloperidol
Answer: A: Haloperidol 
Explanation: Ans. A. HaloperidolProphylactic treatment for bipolar disorder:Lithium (drug of choice)CarbamazepineValproateOther drugs which can be used are topiramate, Lamotrigine, atypical antipsychotics (apiprazale, olanzapine,quetiapine, risperidone, Clozapine) and Gabapentin.