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
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: 
Select and explain. 
A. Panhypopituitarism, B. Polycystic ovarian disease, C. Exogenous estrogen administration, D. Premature menopause
D: Premature menopause
Answer: D: Premature menopause 
Explanation: None