This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
[{'content': 'Mode of action of depolarizing and non-depolarizing neuromuscular blocker? \nSelect and explain. \nA. Depolarizing - no repolarization, non-depolarizing - competitive inhibition, B. Both competitive inhibitors, C. Non-depolarizing - no repolarization; depolarizing - no depolarizin, D. Depolarizing - persistent depolarization no depolarizing - no repolarization', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Depolarizing neuromuscular block-persistent depolarization / no repolarization Non depolarizing - competitive inhibition Succinylcholine is the only depolarising neuromuscular blocker rest all neuromuscular blocker in clinical use are nondepolarising neuromuscular blocker.', 'role': 'assistant'}]