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
Repetitive hand washing is a symptom of: 
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. (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.