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
Maximum tachycardia is seen with 
Select and explain. 
A. Nifedipine, B. Verapamil, C. Propanolol, D. Amlodipine
A: Nifedipine
Answer: A: Nifedipine 
Explanation: Ans. is 'a' i.e., Nifedipine