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
[{'content': 'The most rapidly acting non-depolarizing neuromuscular blocking agent which can be used as an alternative to succinylcholine for tracheal intubation is : \nSelect and explain. \nA. Rocuronium, B. Pancuronium, C. Doxacurium, D. Pipecuronium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]