This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2019, Subject name: Microbiology
[{'content': 'NIH is used for \nSelect and explain. \nA. Pinworm, B. Whip worm, C. Round worm, D. hook worm', 'role': 'user'}, {'content': 'Answer: A \nExplanation: NIH swabs are used to collect eggs of Pinworm (Enterobius) Eggs are collected from the perianal skin by NIH swab or cellophane tape. Pinworms are not released in feces, the diagnosis cannot be made by conventional fecal ova and parasite tests', 'role': 'assistant'}]