<prompt> Longest acting local anesthetic agent is -ProcaineLidocainePrilocaineDibucaine  <response>: Ans. is d i.e., Dibucaine Local Anesthetic agentsShort duration 30 minLow potencyIntermediate duration 30-90 minIntermediate potencyLong duration 120 min High potencyChlorprocaine shortest actingLignocaincMepivacaineBupivacaineTetracaineProcainePrilocaineCocaineEtodicaineRopivacaineDibucaine longest acting 