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': 'Which of the following statements differentiates the obsessional idea from delusions : \nSelect and explain. \nA. The idea is not a conventional belief, B. The idea is held inspite of contrary evidence, C. The idea is regarded as senseless by patient, D. The idea is held on inadequate ground', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Insight is present in OCD and the patient recognizes the thought as irrational and absurd (senseless). While, insight is absent for delusions and patient does not recognize the thought as irrational.', 'role': 'assistant'}]