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 among the following is acid fast? 
Select and explain. 
A. Entamoeba histolytica, B. Giardia Iambiia, C. Cryptosporidium oocyst, D. Microsporidia
C: Cryptosporidium oocyst
Answer: C: Cryptosporidium oocyst 
Explanation: Ans : c) Cryptosporidium oocystAcid last structures:Nocardiaisosporasmegma bacillimycobacteriumlegionellamicoadispermatic headbacterial spores rhodococcusCryptosporidium cystAcid fast staining was discovered by Ehrlich. Modified by Ziehl & Neelson Acid fastness is a property of lipids & it also depends on the integrity of cellwall.