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
Most common CNS manifestation of HIV Infection is: 
Select and explain. 
A. Acute Meningitis, B. Encephalopathy, C. Vacuolar myelopathy, D. Dementia
D: Dementia
Answer: D: Dementia 
Explanation: HIV Encephalopathy also called HIV - Associated dementia or AIDS dementia.
 
This is generally a late complication of HIV infection, it can be seen patients with CD4 count >350 cells.
 
HIV encephalopathy is a sub-cortical dementia while
 
.• Alzheimer's is a cortical dementia
 
Alzheimer's disease is the most common cause of dementia in elderly.
 
Most important risk factor for Alzheimer'^ disease is age