This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Menopause and HRT, Subject name: Gynaecology & Obstetrics
[{'content': 'Day 3 serum Estrogen levels to diagnose premature ovarian failure: \nSelect and explain. \nA. <10-20 pg/ ml, B. <20-40 pg/ ml, C. <60-80 pg /ml, D. <40-60 pg /ml', 'role': 'user'}, {'content': "Answer: C \nExplanation: Diagnosis of premature ovarian failure: History of amenorrhea in less than 35 years, Day 3 Serum FSH>10-15 miu/ml,LH < 10 IU/L, Day 3 serum estrogen 60-80 pg/ml or less. Anti-mullerian hormone is low, Inhibin is low, Antral follicular count measuring 2-9mm in both the ovariess and number of follicles and size,count less than 4-5 on day 2-5 denotes poor response to hormones,Usg ovarian volume is low and progesterone on 21/22 day is >15ng/ml. SHAW'S TEXTBOOK OF GYNAECOLOGY, 16TH edition,Pg no:257", 'role': 'assistant'}]