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 contraceptive helps in preventing carcinoma cervix : \nSelect and explain. \nA. Barrier contraceptive, B. Intra cervical device, C. Intra uterine contraceptive device, D. Oral pill', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Barrier contraceptive', 'role': 'assistant'}]