This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Forensic Psychiatry, Subject name: Forensic Medicine
[{'content': 'Repetitive hand washing is a symptom of: \nSelect and explain. \nA. Post-traumatic stress disorder, B. Depression, C. Anorexia nervosa, D. Obsessive compulsive disorder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (D). Obsessive compulsive disorderRepetitive hand washing is a feature of OCD.Persistent and recurrent thought or emotion that cannot be eliminated from consciousness by reasoning.Insight is present.Disorder of content of thought.Involuntary.', 'role': 'assistant'}]