This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
Maximum duration of action is seen with 
Select and explain. 
A. Atracurium, B. Rocurium, C. Pancuronium, D. Rapacurium
C: Pancuronium
Answer: C: Pancuronium 
Explanation: Non-depolarising blockers : Long acting (>50mins) : d-Tubocurare, Pancuronium, Doxacurium, Pipecuronium. Intermediate acting (20-50mins) : Vecuronium, Atracurium ,Cisatracurium, Rocuronium . Sho acting (<20mins) : Mivacurium,Rapacuronium.