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 of the following calcium channel blocker has a predominant peripheral action: September 2006 \nSelect and explain. \nA. Verapamil, B. Diltiazem, C. Nifidepine, D. Depranil', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Nifidepine Sublingual nifedipine has previously been used in hypeensive emergencies. This was found to be dangerous, and has been abandoned. Sublingual nifedipine causes blood-pressure lowering through peripheral vasodilation. It can cause an uncontrollable decrease in blood pressure, reflex tachycardia, and a steal phenomenon in ceain vascular beds', 'role': 'assistant'}]