This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: recent papers  obst, Subject name: Gynaecology & Obstetrics
[{'content': 'In low ovarian reserve, anti-mullerian hormone level will be \nSelect and explain. \nA. <1, B. 4-Jan, C. >7, D. >10', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * AMH levels in mature women reflect ovarian follicle reserve * Expressed by the granulosa cells of small preantral follicles * Vary minimally across the cycle * 3 ng/mL at age 25, and this dropped to 1 ng/mL at age 35 to 37. * In case of low ovarian reserve- levels are <1 ng/ml Ref:- Williams gynecology 3rd Edition; Pg num:- 436', 'role': 'assistant'}]