This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
All of the following are amide class of local anesthetic except 
Select and explain. 
A. Lignocaine, B. Mepivacaine, C. Prilocaine, D. Chlorprocaine
D: Chlorprocaine
Answer: D: Chlorprocaine 
Explanation: Chlorprocaine belong ester class of local anesthetics.