This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Persistent diarrhoea in AIDS is caused by A/E - 
Select and explain. 
A. Microspora, B. Cryptococcus, C. Cryptosporidia, D. Isospora belli
C: Cryptosporidia
Answer: C: Cryptosporidia 
Explanation: repeat