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 organism most commonly causing genital filariasis in most pa 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: Ans. is 'a' i.e., Wuchereria bancrofti . W. bancrafti is the most widely distributed human filarial parasite.", 'role': 'assistant'}]