This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Anaesthesia
Which of the following local anesthetics causes methemoglobinemia:- 
Select and explain. 
A. Lignocaine, B. Benzocaine, C. Chloroprocaine, D. Dibucaine
B: Benzocaine
Answer: B: Benzocaine 
Explanation: Methemoglobinemia * Benzocaine * Prilocaine * EMLA Cream (Lignocainee + Prilocaine) Physiologically Iron in Hb is Fe2+ If iron in Hb is Fe3+ - Methemoglobin Rx: IV Methylene Blue