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
The beta blocker having intrinsic sympathomimetic activity is: 
Select and explain. 
A. Propranolol, B. Atenolol, C. Sotalol, D. Pindolol
D: Pindolol
Answer: D: Pindolol 
Explanation: None