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: Anaesthesia
[{'content': 'Which of the following local anaesthetic has the potential to cause methamoglobinemia ? \nSelect and explain. \nA. Procaine, B. Prilocaine, C. Tetracaine, D. Bupivacaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Prilocaine is a local anaesthetic similar to lignocaine. A metabolite of prilocaine has the potential to cause methaemoglobinemia. Prilocaine is used mainly for infiltration, nerve block and for providing intravenous regional anaesthesia.', 'role': 'assistant'}]