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': 'Which one of the following methods for induction of labor should not be used in a patient with previous lower segment cesarean section? \nSelect and explain. \nA. PGE2 gel, B. PGE1 tablet, C. Stripping of the membrane, D. Oxytocin drip', 'role': 'user'}, {'content': 'Answer: B \nExplanation: PGE1 is contraindicated in previous cesarean scar pregnancy in view of scar ruptureRef: William&;s obstetrics; 25th edition', 'role': 'assistant'}]