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': 'All are causes of Antepartum hemorrhage (APH) except: \nSelect and explain. \nA. Placenta previa, B. Abruptio placenta, C. Circumvallate placenta, D. Battledore placenta', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of Antepartum Hemorrhage\n\nPlacenta previa\nAbruptio placenta\nVasa previa\nCircumvallate placenta\nLocal causes like:\n\n\nPolyp\nCarcinoma cervix\nVaricose veins\nTrauma\n\n\nUnclassified or indeterminate\n\nCircumvallate placenta\n\nIt is an uncommon cause of antepartum hemorrhage.\nIn this condition, the chorionic plate which is on the fetal side of the placenta is smaller than the basal plate on the maternal side.\nThe fetal surface of the placenta presents a central depression surrounded by a thickened grayish white ring.\nThese pregnancies may be complicated by IUGR and an increased chance of fetal malformations.\nBleeding is usually painless.\nAntenatal diagnosis is unlikely and the diagnosis is usually made after examination of the placenta post delivery.', 'role': 'assistant'}]