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: Social & Preventive Medicine
Persistent diarrhoea in AIDS is caused by A/E -a)  Micro sporab)  Cryptococcus c)  Cryptosporidiad)  Isospora bellie) Giardia lamblia 
Select and explain. 
A. a, B. b, C. ce, D. ae
C: ce
Answer: C: ce 
Explanation: None