This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
Shortest acting muscle relaxant: 
Select and explain. 
A. Tubocurarine, B. Succinylcholine, C. Pancuronium, D. Atracurium
B: Succinylcholine
Answer: B: Succinylcholine 
Explanation: 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.