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
The most rapidly acting non-depolarizing neuromuscular blocking agent which can be used as an alternative to succinylcholine for tracheal intubation is : 
Select and explain. 
A. Rocuronium, B. Pancuronium, C. Doxacurium, D. Pipecuronium
A: Rocuronium
Answer: A: Rocuronium 
Explanation: None