Longest acting LA is ?: (A) Bupivacaine+ Etidocaine, (B) Bupivacaine + lignocaine, (C) Procaine + lidocaine, (D) Bupivacaine + mepivacaine
Answer is A. Half life order - Bupivacaine> Etidocaine> Mepivacaine> Lignocaine.
Same will be the order of duration of action.