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': 'AUB - O is all except \nSelect and explain. \nA. Dysfunctional uterine bleeding., B. Amenorrheic for weeks to months followed by heavy bleeding., C. Availability of arachidonic acid is reduced at cellular level., D. Increased progesterone levels.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: If Ovulation does not occur, no progesterone is produced.', 'role': 'assistant'}]