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': 'Weight of normal uterus is : \nSelect and explain. \nA. 30 -- 45 gms, B. 45 -- 60 gms, C. 60 -- 70 gms, D. 80 -- 100 gms', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 45 -- 60 gms', 'role': 'assistant'}]