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
Nonselective beta adrenergic antagonist is 
Select and explain. 
A. Nodalol, B. Atenolol, C. Bisoprolol, D. Esmolol
A: Nodalol
Answer: A: Nodalol 
Explanation: Ans. is 'a' i.e., Nodalol