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': 'Central placenta pre in 37 weeks gestation, treatment is : \nSelect and explain. \nA. Vaginal delivery with ARM, B. Elective cesarean, C. Cesarean when bleeding stas, D. Conservative and wait till 38 weeks gestation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Elective cesarean', 'role': 'assistant'}]