This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Reproductive physiology and hormones in females, Subject name: Gynaecology & Obstetrics
[{'content': 'The following are related to corpous luteum except \nSelect and explain. \nA. Luteinised granulosa cells produce progesterone, B. Estrogen continues to be produced by the luteinised granulosa cells, C. Luteolysis is due to estrogen, PGF2a and endothelin, D. The peak steriod production is between 23 and 25th day', 'role': 'user'}, {'content': "Answer: D \nExplanation: The estrogen attains a lower level and maintains a plateau curve as against a peak rise in follicular phase. Progesterone attains its highest peak about 8 days(22nd day of menstual cycle) after the LH peak Regression of corpus luteum is attrubuted to fall in LH level and rise in the level of estrogen and PGF2alpha. Ref: D.C. Dutta's Textbook of Gynaecology, 6th edition, page no: 93", 'role': 'assistant'}]