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': 'Which of the following feature is not common between delirium and dementia? \nSelect and explain. \nA. Disturbance of memory, B. Hallucinations, C. Delusions, D. Fluctuating course', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Delirium is characterized by acute onset and fluctuating course,\xa0 where as dementia patients with chronic and downhill course.', 'role': 'assistant'}]