<prompt> Agent with shortest acting period -ProcaineLignocaineBupivacaineDibucaine  <response>: Ans. is a i.e., ProcaineShort durationLow potencyIntermediate duration 30-90 minIntermediate potencyLong duration 120 minHigh potencyo Chlorprocaine shortest actingo Procaineo Lignocaineo Mepivacaineo Prilocaineo Cocaineo Bupivacaineo Tetracaineo Etodicaineo Ropivacaineo Dibucaine longest acting 