This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'Marker for menopause transition is: \nSelect and explain. \nA. Menstrual irregularity, B. Hot flushes, C. | bone mass, D. Cessation of menstruation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a, i.e. Menstrual irregularityRef: Williams gynae 3rd/ed, p472There is only one marker of menopausal transition, is menstrual irregularity. The cycles have long intervals (greater than 60 days).', 'role': 'assistant'}]