<prompt> Shortest acting muscle relaxant:TubocurarineSuccinylcholinePancuroniumAtracurium  <response>: Ans. B. SuccinylcholineThere are two types of muscle relaxant - depolarizing and non-depolarizing, succinylcholine is the shortest acting depolarizing MR and mivacurium is longest acting non-depolarizing MR. 