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 drugs are used in the treatment of Obsessive Compulsive Disorder (OCD)? 
Select and explain. 
A. Clomipramine, B. Lithium, C. Olanzepine, D. None
A: Clomipramine
Answer: A: Clomipramine 
Explanation: Fluoxetine and Clomipramine are the drugs preferred and Cognitive Behavioural Therapy is the treatment modality of choice. SSRIs help the condition by increasing the seratonin levels.