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': 'Risk factor for Ca Cervix \nSelect and explain. \nA. HPV, B. Smoking, C. Late Menarche, D. Nulliparity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. HPV; Smoking; and Early sexual intercourse', 'role': 'assistant'}]