This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'All are dihydropyridines except: \nSelect and explain. \nA. Nifedipine, B. Nimodipine, C. Verapamil, D. Felodipine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Verapamil is a phenylalkalamine group of calcium channel blockers. All others mentioned in options are dihydropyridines. They are used in HTN, angina, Peripheral vascular disorders. REF.Essentials of Pharmacology KD Tripathi 8th ed.', 'role': 'assistant'}]