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': 'Beta blocker with peripheral vasodilator action is: \nSelect and explain. \nA. Propranolol, B. Carvedilol, C. Atenolol, D. Acebutolol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]