This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'the distention media used in diagnostic hysteroscopy with bipolar couesy is \nSelect and explain. \nA. CO2, B. NS, C. Dextran 70, D. Glycine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ref : gynecology shaw', 'role': 'assistant'}]