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
A 50 year old man had an attack of myocardial infarction and developed ventricular ectopics and low ejection fraction. Which of the following antiarrhythmic drug to be given - 
Select and explain. 
A. Flecainide, B. Mexilitine, C. Beta-blocker, D. Radio-frequency ablation technique
C: Beta-blocker
Answer: C: Beta-blocker 
Explanation: Ans. is 'c' i.e., Beta-blockers "Beta-adrenoreceptor blocking agents are effective in abolishing ventricular ectopic activity in patients with acute MI .""Because of concerns about worsening arrhythmia and sudden death with most antiarrhythmic agents, beta- blockers are the agent of choice".