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': 'Reduction in estradiol levels leads to all except \nSelect and explain. \nA. Increase in hypothalamic Norepinephrine., B. Increase in hypothalamic serotonin., C. Decrease in α2 receptor concentration., D. Increase in α2 receptor concentration.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Reductions in estradiol levels lead to decline in inhibitory presynaptic\xa0α2 adrenergic receptor concentrations.', 'role': 'assistant'}]