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': 'β blocker with intrinsic sympathomimetic activity \nSelect and explain. \nA. Propanalol, B. Carvedilol, C. Acebutolol, D. Atenolol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: β blockers with intrinsic sympathomimetic activity have partial agonistic action on\xa0β1 receptors thus causing lesser bradycardia.\nEx: Acebutalol, Celiprolol, Cartelol, Pindolol, Penbutolol, Labetalol.', 'role': 'assistant'}]