This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
[{'content': 'Which of the following is acid fast: \nSelect and explain. \nA. Oocyst of Cryptosporidium, B. Cyst of entamoeba, C. Hydatid disease cyst, D. Cysticercus cyst', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a (Oocyst of Cryptosporidium) Ref: Harrison, 16th ed, p. 1250Oocyst of Cryptosporidium is acid fastAcid fast organisms include1. Nocardia2. Legionella micoadie3. Bacterial spores4. Rhodococcus5. Isospora6. Mycobacterium7. Spermatic head8. Cryptococcus cyst', 'role': 'assistant'}]