This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
[{'content': 'True statement regarding delirium includes \nSelect and explain. \nA. Insidious onset, B. Clear consciousness, C. Irreversible, D. Decreased attention', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (D) Decreased attention # DELIRIUM:> Delirium is defined as a transient, usually reversible, cause of cerebral dysfunction and manifests clinically with a wide range of neuropsychiatric abnormalities.> Clinical hallmarks are decreased attention span and a waxing and waning type of confusion.> Delirium or acute confusional state is a transient global disorder of cognition.', 'role': 'assistant'}]