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': 'Regarding placenta previa all are true except \nSelect and explain. \nA. Painless bleeding per vaginum, B. P V examination contraindicated, C. Recurrent in same pregnancy, D. Stallworthy sign seen in all varieties', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Stallworthy sign is fetal distress seen in posterior varieties of placenta previa.', 'role': 'assistant'}]