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': 'Global cerebral dysfunction characterized by alteration in cognitive function and consciousness is known as - \nSelect and explain. \nA. Acute anxiety, B. Depression, C. Delirium, D. Dementia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Infection (like pneumonia) is one of the cause of delirium.\nAltered sensorium, disorientation to place (Patient thinks he is in jail) and person (not recognizing the doctor and staff), and hallucinations (scorpions attacking him) suggest the diagnosis of delirium.', 'role': 'assistant'}]