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
Presence of Crytosporidium in a stool sample is identified using 
Select and explain. 
A. Modified acid fast staining, B. Iodine staining, C. Warthin Starry stain, D. Iron haematoxylin stain
A: Modified acid fast staining
Answer: A: Modified acid fast staining 
Explanation: None