This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Location of beta 3 receptors include \nSelect and explain. \nA. Bronchial muscle, B. Vascular muscle, C. Bladder, D. Uterus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]