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
Most common opportunistic infection in AIDS is: 
Select and explain. 
A. Cryptococcosis, B. Tuberculosis, C. Candidiasis, D. Aspergillosis
C: Candidiasis
Answer: C: Candidiasis 
Explanation: None