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 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 : 
Select and explain. 
A. Bilateral tubal obstruction, B. Polycystic ovarian disease, C. Premature menopause, D. Exogenous estrogen administration
C: Premature menopause
Answer: C: Premature menopause 
Explanation: Premature menopause