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: Medicine
A patient with heart failure developed ventricular arryhthmia. Treatment is/are -a) Encainideb) Flecainidec) Intracardiac Defibrilationd) Beta-blockerse) Amiodarone 
Select and explain. 
A. abd, B. cde, C. bde, D. ade
B: cde
Answer: B: cde 
Explanation: None