This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Which anaesthetic belongs to ester group 
Select and explain. 
A. Procaine, B. Bupivacaine, C. Lignocaine, D. Mepivacaine
A: Procaine
Answer: A: Procaine 
Explanation: Esters (aminoesters):- procaine, chlorprocaine, tetracaine (amethocaine), Benzocaine, CocaineAmides (aminoamides):- Lignocaine, Mepivacaine, Prilocaine, bupivacaine, Etidocaine, ropivacaine, dibucaine(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition, pg no. 268-270)