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
[{'content': 'A patient with heart failure developed ventricular arryhthmia. Treatment is/are -a) Encainideb) Flecainidec) Intracardiac Defibrilationd) Beta-blockerse) Amiodarone \nSelect and explain. \nA. abd, B. cde, C. bde, D. ade', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]