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 35-years-old lady is not having her menses for last 4 months. She has high serum FSH and LH level with low estradiol. The likely cause is: \nSelect and explain. \nA. Panhypopituitarism, B. Polycystic ovarian disease, C. Exogenous estrogen administration, D. Premature menopause', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]