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': 'Acid-fast oocysts are seen in- \nSelect and explain. \nA. Cryptosporidium, B. Isospora, C. Cyctospora, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acid fast parasites\n\n1. Cryptosporidium parvum\n2 Cyclospora sp\n3. Isospora belli\n4. Taenia saginata → → → → Oocyst Egg', 'role': 'assistant'}]