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': 'Delusion is : \nSelect and explain. \nA. Comprehensible, B. Reasonable, C. Both, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D. i.e. None', 'role': 'assistant'}]