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
NIH swab is used to demonstrate 
Select and explain. 
A. Enterobius, B. Trichuris, C. Ancyclostoma, D. Necator
A: Enterobius
Answer: A: Enterobius 
Explanation: NIH (National Institute of health swab) is used in diagnosis of Enterobius.