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
[{'content': 'The slender rhabditiform larvae of which of the following helminths move about in water and are ingested by species of cyclops - \nSelect and explain. \nA. D. latum, B. D. medinensis, C. W.bancrofti, D. S. mansoni', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]