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
[{'content': 'True about obsession - compulsive disorder are A/E - \nSelect and explain. \nA. Ego-alien, B. Patient tries to resist against, C. Ego syntonic, D. Insight is present', 'role': 'user'}, {'content': "Answer: C \nExplanation: OCD is ego-dystonic (not egosyntonic).\nCharacteristic features of obsession & compulsion \n\nThey are egoalien, i.e. experienced as foreign to person's experience of himself.\nThey are egodystonic, i.e. (unwanted behavior).\nThought is recognized as irrational and absurd (insight is present)\nPatient tries to resist against it however patient is unable to do so (thought is irresistible) → Inability to resist causes marked distress or anxiety.", 'role': 'assistant'}]