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': 'lrregular shsdding ot the endomgtrlum occura due to : \nSelect and explain. \nA. Epithelium being immalure, B. lt does nol show the decidus - like oedema ot the secretory phase, C. Regression of the corpus luteum tunction, D. Over activily ot the corpus luteum function', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Over activily ot the corpus luteum function', 'role': 'assistant'}]