This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypeension, Arrhythmias, Dyslipidemia, Subject name: Pharmacology
[{'content': 'A 70-year-old lady in the emergency came with chest pain. Her ECG shows ventricular tachycardia with ST-segment elevation. Troponin C levels are high. A diagnosis of STEMI is made. The arrhythmias should be treated initially with \nSelect and explain. \nA. Lignocaine, B. Adenosine, C. Quinidine, D. Verapamil', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lidocaine is used as drug of choice for emergency treatment of post myocardial infarction arrhythmias. Procainamide or amiodarone can also be used as alternatives. After acute phase of MI, b blockers are used for 2 years or more for arrythmias.', 'role': 'assistant'}]