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: Gynaecology & Obstetrics
[{'content': 'Which of the following is most commonly implicated in causing genital was? \nSelect and explain. \nA. HPV 16, B. HPV 6, C. HPV 18, D. HPV 28', 'role': 'user'}, {'content': 'Answer: B \nExplanation: HPV types 6 and 11 cause nearly all genital was. Ref: Williams Gynaecology 1 st edition page 619.', 'role': 'assistant'}]