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: Pharmacology
[{'content': 'Which is true about calcium channel blockers - \nSelect and explain. \nA. Verapamil causes reflex tachycardia, B. Diltiazam causes reflex tachycardia, C. Nifedipine causes reflex tachycardia, D. Nifedipine has longer t1/2 than felodipine', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Nifedipine causes reflex tachycardia o DHPs (nifedipine) cause reflex tachycardia.o Felodipine - it differs from nifedipine in having greater vascular selectivity, large tissue distribution and longer 0/2.", 'role': 'assistant'}]