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: Microbiology
The most common organism amongst the following that causes acute meningitis in an AIDS patients is- 
Select and explain. 
A. Streptococcus pneumoniae, B. Steptococcus agalactiae, C. Cryptococcus neoformans, D. Listeria monocytogenes
C: Cryptococcus neoformans
Answer: C: Cryptococcus neoformans 
Explanation: None