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': 'Asherman syndrome is due to : \nSelect and explain. \nA. Overdose drugs, B. Postaboion curettage, C. Speticemia, D. Contraceptal pills', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Postaboion curettage', 'role': 'assistant'}]