This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sympathetic System, Subject name: Pharmacology
Which of the following beta blocker has additional vasodilator action? 
Select and explain. 
A. Atenolol, B. Metoprolol, C. Propranolol, D. Carvedilol
D: Carvedilol
Answer: D: Carvedilol 
Explanation: Carvedilol has additional vasodilatory action due to its alpha blocking propey. These are called third generation beta blockers. Third-Generation Beta-Blockers - a blockade (labetalol, carvedilol), - b2 agonism (celiprolol, caeolol, bopindolol), - Release of NO (nebivolol, nipradilol), - Opening of K+ channels (tilisolol) - Inhibition of Ca2+ channels (carvedilol, bevantolol, betaxolol).