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
[{'content': 'Parasites for which modified ZN stain is used ? \nSelect and explain. \nA. Isospora, B. Microsporidia, C. Plasmodium, D. Echinococcus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Isospora", 'role': 'assistant'}]