This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrine Control of the Menstrual Cycle, Subject name: Gynaecology & Obstetrics
[{'content': 'Menorrhagia is defined as blood loss per vagina more than - \nSelect and explain. \nA. 80 ml, B. 110 ml, C. 150 ml, D. 50 ml', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. 80 ml (Ref Shaws, 13/e, p 291 (12/e, p. 229)). Menorrhagia - when blood loss is more than 80 ml* Oligomenorrhea - when blood loss is less than 20 ml*", 'role': 'assistant'}]