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': "In patient of hypeension, metoprolol and verapamil are given together. This combination can result in \nSelect and explain. \nA. Atrial fibrillation, B. Bradycardia, C. Torsades' de pointes, D. Tachycardia", 'role': 'user'}, {'content': "Answer: B \nExplanation: Beta blocker (metoprolol) and non-DHP CCBs (verapamil) block SA node and AV node. Both combined can cause severe bradycardia and AV block. Drugs causing Torsades' de pointes include: Quinidine, Procainamide, Cisapride, Astemizole, Terfenadine etc.", 'role': 'assistant'}]