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
[{'content': 'Which anaesthetic belongs to ester group \nSelect and explain. \nA. Procaine, B. Bupivacaine, C. Lignocaine, D. Mepivacaine', 'role': 'user'}, {'content': "Answer: A \nExplanation: 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)", 'role': 'assistant'}]