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 36 year old woman has noticed, absence of menses for the last 4 months. A pregnancy test is negative. Serum levels of luteinizing hormone and follicle stimulating hormone are elevated and the serum estradiol levels is low. These findings suggest : \nSelect and explain. \nA. Bilateral tubal obstruction, B. Polycystic ovarian disease, C. Premature menopause, D. Exogenous estrogen administration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Premature menopause', 'role': 'assistant'}]