This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Dementia, Subject name: Medicine
The most common late CNS complication of HIV is: 
Select and explain. 
A. Dementia, B. Ataxia, C. Seizures, D. Delirium
A: Dementia
Answer: A: Dementia 
Explanation: Ans. is 'a' i.e., Dementia