This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Established Infection, Subject name: Surgery
[{'content': 'Filariasis is cuased due to lymphatic obstruction by - \nSelect and explain. \nA. R vivax, B. V. bancrofti, C. C. sinerses, D. S. hemetabium', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., V. bancrofti", 'role': 'assistant'}]