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': 'Ovarian follicles produce increased amounts of Oestrogen and inhibin during \nSelect and explain. \nA. Early follicular phase, B. Mid follicular phase, C. Late follicular phase, D. Early luteal phase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: During mid follicular phase, follicles produce increased amounts of oestrogen and inhibin, resulting in decline in FSH levels through negative feed back.', 'role': 'assistant'}]