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: Pharmacology
[{'content': 'All of the following drugs are non-selective β blockers with no pharmacological action on any other receptor, EXCEPT: \nSelect and explain. \nA. Propranolol, B. Timolol, C. Sotalol, D. Carvedilol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]