<prompt> Local anaesthetic with prolonged action ?ProcaineCocaineLidocaineDibucaine  <response>: Ans. is d i.e., Dibuca Dibucaine is the longest acting local anaesthetic Chlorprocaine is the shoest acting local anaesthetic Decreasing order of duration : - Dibucaine Bupivacine Tetracaine Ropivacaine Etidocaine Prilocaine Lignocaine Mepivacaine Cocaine Procaine Chlorprocaine . 