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': 'Best treatment of Cord prolapse is : \nSelect and explain. \nA. Replace the cord in vagina, B. Cesarean section, C. Immediate vaginal delivery, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cesarean section', 'role': 'assistant'}]