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
Shorest acting beta blocker - 
Select and explain. 
A. Esmolol, B. Nodalol, C. Acebutolol, D. Sotalol
A: Esmolol
Answer: A: Esmolol 
Explanation: Ans. is 'a' i.e., Esmolol o Nodalol is longest acting b-blocker.o Esmolol is shortest acting b-blocker.o Acebutolol possesses all activities i.e., cardioselectivity, partial agonist activity, membrane stablizing activity and lipid insolubility.