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 of the following statements is true regarding cerclage \nSelect and explain. \nA. Shirodkar procedure is most often selected., B. Broad - spectrum antibiotic prophylaxis is required., C. Ideally performed at 10 → 12 weeks gestation., D. Prolapsing membranes can be reduced with Trendelenburg positioning and bladder filling prior to cerclage placement.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Timing of surgery is between 12\xa0→ 14 weeks gestation\nMcDonald technique is most used procedure\nNo need of antibiotic prophylaxis as membranes not ruptured.', 'role': 'assistant'}]