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
Beta 1 antagoinst used in congestive cardiac failure? 
Select and explain. 
A. Atenolol, B. Metoprolol, C. Salbutamol, D. Terbutaline
B: Metoprolol
Answer: B: Metoprolol 
Explanation: Ans. is 'b' i.e., Metoprolol o Beta blockers approved for use in CHF are Carvedilol (most commonly used), metoprolol and bisoprolol. o Other agents can also be used (see above explanation).