This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
Which of the following beta blocker doesn't cause bradycardia? 
Select and explain. 
A. Pindolol, B. Labetalol, C. Bisoprolol, D. Atenolol
A: Pindolol
Answer: A: Pindolol 
Explanation: Ans. A. PindololPindolol is beta blocker with intrinsic sympathomimetic activity. These drugs themselves activate beta 1/2 sub maximally.