<prompt> Shoest acting muscle relaxant is:-TubocurarineSuccinylcholinePancuroniumAtracurium  <response>: Muscle Relaxants are of two types:- MR Depolarizing Non Depolarizing Shoest Acting Depolarizing muscle relaxant -succinyl choline. Overall shoest acting muscle relaxant- succinyl choline. Action of succinyl choline last for 5 mins. Shoest Acting Non-Depolarizing Muscle relaxant - Mivacurium. 