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: Surgery
Most potent topical anesthestic is 
Select and explain. 
A. Mepivacaine, B. Prilocaine, C. Benzocaine, D. Tetracaine
D: Tetracaine
Answer: D: Tetracaine 
Explanation: None