<prompt> All are surface anaesthetics except -LignocaineBupivacaineProcaineCinchocaine  <response>: Ans. is b i.e., Bupivacaine o Topical anaesthesia surface anaesthesia is produced by topical application of local anaesthetics to mucous membrane or abraded skin. o Surface anaesthetics are Dibucaine Cinchocaine Lignocaine Benoxinate Oxethazaine Prilocaine Tetracaine Amethocaine Cocaine Benzocaine Butamben o Procaine has very less potent surface anaesthetic action 110 -- not used as surface anaesthetic. o But amongst the given options best answer is bupivacaine, it does not have surface anaesthetic action. 