This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Placenta - Types and their complications, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is the most common predisposing factor for placenta accreta? \nSelect and explain. \nA. Myomectomy, B. Recent curettage, C. Previous cesarean section, D. Placenta pre', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Placenta accreta is the attachment of placenta directly to the myometrium without any intervening decidua basalis Impoant risk factor : * Placenta pre ( most common ) * Prior cesarean section', 'role': 'assistant'}]