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': 'Which of the following adrenergic receptors are metabotropic receptors? \nSelect and explain. \nA. Alpha 1, B. Alpha 2, C. Beta 1, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All adrenergic receptors are GPCR or metabotropic receptors.', 'role': 'assistant'}]