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: Forensic Medicine
Repetitive hand washing is a symptom of: NIMHANS 07; AFMC 11 
Select and explain. 
A. Post-traumatic stress disorder, B. Depression, C. Anorexia nervosa, D. Obsessive compulsive disorder
D: Obsessive compulsive disorder
Answer: D: Obsessive compulsive disorder 
Explanation: Ans. Obsessive compulsive disorder