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': 'A woman is said to be having menorrhagia if the menstrual blood loss is more than : \nSelect and explain. \nA. 20 ml, B. 40 ml, C. 60 ml, D. 80 ml', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 80 ml', 'role': 'assistant'}]