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
All of the following can cause methemoglobinemia except- 
Select and explain. 
A. Prilocaine, B. Benzocaine, C. Nitroglycerine, D. Bupivacaine
D: Bupivacaine
Answer: D: Bupivacaine 
Explanation: 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.