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': 'Induction of aboion is best by : \nSelect and explain. \nA. Oxytocin, B. PGE2 gel, C. Stripping of membrane, D. Oestrogen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: PGE2 gel', 'role': 'assistant'}]