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
Which of the following is acid fast: 
Select and explain. 
A. Oocyst of Cryptosporidium, B. Cyst of entamoeba, C. Hydatid disease cyst, D. Cysticercus cyst
A: Oocyst of Cryptosporidium
Answer: A: Oocyst of Cryptosporidium 
Explanation: 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