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 cause of larva currens: \nSelect and explain. \nA. Strongyloides stercoralis, B. Necator americanus, C. Ankylostoma duodenale, D. H. nana', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Strongyloides stercoralis(Ref: Harrison, 19th/e, p.1415)* The migrating filariform larva of Strongyloides moves rapidly in a short line at the rate of 3-4 cm in an hour, hence it is termed "larva currens".', 'role': 'assistant'}]