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: Medicine
[{'content': "Alzheimer's disease is associated with -a) Deleriumb) Delusionc) Dementiad) Depression \nSelect and explain. \nA. ab, B. bc, C. bd, D. cd", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]