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: Pharmacology
An of the following can induce methemoglobinemia EXCEPT : 
Select and explain. 
A. Nitroglycerine, B. Procaine, C. Prilocaine, D. Phenytoin
D: Phenytoin
Answer: D: Phenytoin 
Explanation: None