This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Anesthesia, Subject name: Anaesthesia
Which of the following local anesthetic is amide : 
Select and explain. 
A. Lidocaine, B. Procaine, C. Chloroprocaine, D. Cocaine
A: Lidocaine
Answer: A: Lidocaine 
Explanation: Lidocaine is an amino amide local anaesthetic. Metabolized by microsomal P-450 enzymes in the liver. cocaine , proacaine and chloroprocaine are sho acting amino ester local anesthetic.