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': 'Risk factors for Placenta Accreta include all of the following, except: \nSelect and explain. \nA. Previous LSCS scar, B. Previous curettage, C. Previous myomectomy, D. Previous placenta prae', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In placenta accreta, there is a failure of normal decidua to form which causes the placenta to be directly anchored to the myometrium either paially or completely without any intervening decidua. Placenta prae in the present pregnancy is a risk factor for placenta accreta but previous placenta prae is not a risk factor. Ref: Manual of Pathology of the Human Placenta By Rebecca N. Baergen, Ku Benirschke; 2nd edition, Pages 192-97; Dutta textbook of Obstetrics 6th edition, Pages 420-21', 'role': 'assistant'}]