<prompt> Arrange the following long acting LA in descending order of their duration of action.DibucaineEtidocaineTetracaine Bupivacaine.DibucaineTetracaineBupivacaine Etidocaine.TetracaineDibucaineBupivacaineEtidocaine.TetracaineBupivacaineDibucaine Etidocaine.  <response>: Dibucaine is longest acting and most toxic.Etidocaine: 200minutes.TetracaineBupivacaine:175 minutes. 