This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Anesthesia, Subject name: Anaesthesia
[{'content': 'All of the following can cause methemoglobinemia except- \nSelect and explain. \nA. Prilocaine, B. Benzocaine, C. Nitroglycerine, D. Bupivacaine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Methemoglobinemia is a rare but potentially life - threatening complication that may follow theadministration of ceain drugs that causes oxidation of hemoglobin to Methemoglobin. Drugs whichcause this - prilocaine benzocaine, rarely Lignocaine, nitroglycerine, Phenytoin sulphonamide.', 'role': 'assistant'}]