This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'In postmenopausal women, estrogen is metabolized mostly into \nSelect and explain. \nA. Estriol, B. Estrone, C. Estradiol, D. Androstenedione', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]