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': 'A patient presents with one month history of abnormal hallucination and delusion. The patient lacks the insight to his changed behaviour. Likely diagnosis is - \nSelect and explain. \nA. Paronia, B. Depression, C. Psychosis, D. Schizophrenia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Delusion, hallucinations and lack of insight are features of psychosis.', 'role': 'assistant'}]