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': '"Confusional assessment method" is used for : \nSelect and explain. \nA. Dementia, B. Schizophrenia, C. Bipolar disorder, D. Delirium', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Delirium is an organic brain disorder of acute onset & fluctuating course characterized by altered sensorium / disturbed consciousness.\nConfusional assessment method & bed side tests like MMSE are used to evaluate delirium.', 'role': 'assistant'}]