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
Which of the following is the drug of choice for OCD? 
Select and explain. 
A. Haloperidol, B. Clozapine, C. Doxapine, D. Clomipramine
D: Clomipramine
Answer: D: Clomipramine 
Explanation: Two approaches which are indicated in the treatment of OCD are use of SSRIs and Cognitive behavioral therapy. Drugs which are approved for the treatment of OCD are clomipramine, fluoxetine, fluvoxamine and sealine. Reference: Current Diagnosis and Treatment : Psychiatry 2nd edition chapter 18.