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': 'Adenocarcinoma cervix is associated with all, except: \nSelect and explain. \nA. HPV 11, B. HPV 16, C. HPV 18, D. HPV 51', 'role': 'user'}, {'content': "Answer: A \nExplanation: HPV strains for carcinoma cervix are HPV 16, 18, 31, 33, 35, 39, 45, 51, 52, 56 & 58 Ref: Novak's Gynaecology, 14th Edition, Page 568", 'role': 'assistant'}]