This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adverse Drug Effect, Subject name: Pharmacology
[{'content': 'Maximum tachycardia is seen with- \nSelect and explain. \nA. Nifedipine, B. Verapamil, C. Propanolol, D. Amlodipine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Nifedipine Cardiac effectsVerapamilNifedipineDiltiazamo Heart rateo AV conductiono Contractilityo Output|||-,|-,||-|||,-||,|-,|Note:o Verapamil and to a lesser extent diltiazem delay the recovery of Ca++ channel in heart - Cardiodepressant action (| heart rate, conduction, contractility).o Nifedipine (DHPs) does not delay the recovery of Ca^ channel - No cardiodepressant action,o Instead, nifedipine causes reflex sympathetic stimulation - Tachycardia and increased contractility.", 'role': 'assistant'}]