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 of the following local anaesthetic is safer in surface and infiltrating anaesthesia? \nSelect and explain. \nA. Procaine, B. Cocaine, C. Lignocaine, D. Amethocaine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lignocaine and prilocaine are considered as safe local anaesthetic and can be used for both topical and infiltration (local nerve blocks) anaesthesia.', 'role': 'assistant'}]