Shortest acting local anesthetic agent is -

Ans. is 'a' i.e., Procaine o Chlorprocaine is the shortest acting LA. Amongst the given options procaine is shortest acting.Local Anesthetic agentsShort duration(< 30 min) Low potencyIntermediate duration (30-90 min) Intermediate potencyLong duration (> 120 min) High potencyChlorprocaine (shortest acting)LignocaineMepivacaineBupivacaineTetracaineProcainePrilocaineCocaineEtodicaineRopivacaineDibucaine (longest acting)