This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Placenta pre true are: \nSelect and explain. \nA. incidence increases by two fold after LSCS, B. More common in primipara, C. Most common in developed countries, D. 1 per 1000 pregnancies', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prior surgery on the uterus especially Caesarean section increases the incidence of placenta prae two or three fold.The combination of a prior Caesarean section with an anterior placenta prae is paicularly dangerous (refer pgno:129 sheila textbook of obstetrics 2nd edition)', 'role': 'assistant'}]