This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'Which of the following local anaesthetics belongs to the ester group? \nSelect and explain. \nA. Procaine, B. Bupivacaine, C. Lignocaine, D. Mepivacaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Procaine belongs to ester group. Since Ester links are more prone for hydrolysis than amide links generally esters have a shoer duration of action. Other three are amide group. From padmaja 4th edition Page no 199', 'role': 'assistant'}]