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
[{'content': 'The smallest intestinal adult nematode is \nSelect and explain. \nA. Enterobius vermicularis, B. Necator americanus, C. Strongyloides stercoralis, D. Trichuris trichiura', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Strongyloides stercoralis has the most complex life cycle of all the intestinal nematodes--and the greatest risk of acute, overwhelming infection. The adults measure only 2 mm in length, making them the smallest of the intestinal nematodes.Ref: Sherris microbiology; 6th edition; Page no: 858', 'role': 'assistant'}]