This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
[{'content': 'Estrogen beta receptors are found on \nSelect and explain. \nA. Uterus, B. Blood vessels, C. Ovary, D. Vagina', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oestrogen beta receptors are found in blood vessels Ref: guyton and hall textbook of medical physiology 12 edition page number:636,637,638', 'role': 'assistant'}]