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
β blocker with intrinsic sympathomimetic activity 
Select and explain. 
A. Propanalol, B. Carvedilol, C. Acebutolol, D. Atenolol
C: Acebutolol
Answer: C: Acebutolol 
Explanation: β blockers with intrinsic sympathomimetic activity have partial agonistic action on β1 receptors thus causing lesser bradycardia.
Ex: Acebutalol, Celiprolol, Cartelol, Pindolol, Penbutolol, Labetalol.