This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Shoest acting muscle relaxant 
Select and explain. 
A. Pancuronium, B. Atracurium, C. Mivacurium, D. Vecuronium
C: Mivacurium
Answer: C: Mivacurium 
Explanation: MivacuriumMivacurium is the shoest acting competitive blockersIt does not need reversal -can be used as an alternative to SCh for endotracheal intubationIt is metabolized rapidly by plasma cholinesterases -prolonged paralysis can occur in pseudocholinesterase deficiency Mivacurium is the only nondepolarising (competitive) blocker that is metabolized by plasma cholinesterase (pseudocholinesterase).(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.328)