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: Anaesthesia
Which of the drug potentiates neuromuscular blockade 
Select and explain. 
A. Propranolol, B. Amlodipine, C. Metformin, D. Penicillin
B: Amlodipine
Answer: B: Amlodipine 
Explanation: Calcium channel blocker potentiates neuromuscular blockade.