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
[{'content': 'Repetitive hand washing is a symptom of: NIMHANS 07; AFMC 11 \nSelect and explain. \nA. Post-traumatic stress disorder, B. Depression, C. Anorexia nervosa, D. Obsessive compulsive disorder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Obsessive compulsive disorder', 'role': 'assistant'}]