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': 'Nonavalent HPV vaccine consists of \nSelect and explain. \nA. HPV (6,11,16,18,32,34,45,52 and 58), B. HPV (6,11,16,18,31,33,45,52 and 58), C. HPV(6,11,16,18,31,33,46,53 AND 59), D. HPV(6,11,16,18,31,33,46,52 AND 58)', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nonavalent HPV is 6, 11, 16, 18, 31, 33, 45, 52 and 58\nBivalent HPV is (HPV 16 and\xa018)\nQuadrivalent HPV vaccine is (HPV 6, 11, 16 and\xa018)', 'role': 'assistant'}]