<prompt> Most cardiotoxic local anaesthetic:DibucaineBupivacaineLignocaineChlorprocaine  <response>: Ans: b BupivacaineRef: KDT 6th ed. 1357 Bupivacaine is a local anesthetic agent from Amide group. It is most cardiotoxic LA. Shortest acting LA: Chlorprocaine Longest acting LA: Dibucaine Most commonly used LA: Lignocaine Local anesthetic which causes methhemoglobinemia: Prilocaine 