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: Unknown
[{'content': 'Most common CNS manifestation of HIV Infection is: \nSelect and explain. \nA. Acute Meningitis, B. Encephalopathy, C. Vacuolar myelopathy, D. Dementia', 'role': 'user'}, {'content': "Answer: D \nExplanation: HIV Encephalopathy also called HIV - Associated dementia or AIDS dementia.\n\xa0\nThis is generally a late complication of HIV infection, it can be seen patients with CD4 count >350 cells.\n\xa0\nHIV encephalopathy is a sub-cortical dementia while\n\xa0\n.• Alzheimer's is a cortical dementia\n\xa0\nAlzheimer's disease is the most common cause of dementia in elderly.\n\xa0\nMost important risk factor for Alzheimer'^ disease is age", 'role': 'assistant'}]