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
For which parasite modified ZN stain is used: 
Select and explain. 
A. Isospora, B. Microsporidia, C. Plasmodium, D. Echinococcus
A: Isospora
Answer: A: Isospora 
Explanation: Ans. a. Isospora