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': 'Absolute indication for cesarean section: \nSelect and explain. \nA. Previous uterine scar, B. Transverse lie, C. Breech, D. Vaginal Atresia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Vaginal Atresia', 'role': 'assistant'}]