This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Hypertensive, Subject name: Pharmacology
[{'content': 'Which of the following is NOT a Calcium channel blocker \nSelect and explain. \nA. Verapamil, B. Pirenzepine, C. Felodipine, D. Nitrendipine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pirenzepine Pirenzepine is a selective M1 AntagonistCalcium channel blockers.Phenyl alkylamine - VerapamilBenzodiazepine -DiltiazemDihydropyridines - Nifedipine, Felodipine, Amlodipine, Nitrendipine, Nimodipine, Lacidipine More questions on calcium channel blocker -Only voltage sensitive L type channel are blocked by calcium channel blockers.CCB's causing ankle edema - NifedipineCCB's causing Reflex tachycardia - Nifedipine (C/I in angina)CCB's having most depressant affect on heart - Verapamil", 'role': 'assistant'}]