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
The most potent and longest acting anaesthesia is: 
Select and explain. 
A. Tetracaine, B. Bupivacaine, C. Dibucaine, D. Lidocaine
C: Dibucaine
Answer: C: Dibucaine 
Explanation: None