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: Social & Preventive Medicine
[{'content': 'The organism most commonly causing genital filariasis in most part of Bihar and easteran U.P.is - \nSelect and explain. \nA. Wuchereria bancrofti, B. Brugia malayi, C. Onchocerca volvulus, D. Dirofilaria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]