This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotic, Stress Related and Somatoform Disorders, Subject name: Psychiatry
All drugs are used for treatment of OCD except: 
Select and explain. 
A. Carbamazepine, B. Lithium, C. Fluoxetine, D. Diazepam
D: Diazepam
Answer: D: Diazepam 
Explanation: Again, we have to choose between Carbamazepine and diazepam. Now, diazepam is a benzodiazepine and can improve anxiety temporarily however it doesn't act at core symptoms of OCD. Whereas, Carbamazepine, though has minimal evidence, but it has been found to act on core symptoms of OCD.