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: Anaesthesia
Which of the following is not an anesthetic that acts for more than 2hrs? 
Select and explain. 
A. Bupivacaine, B. Prilocaine, C. Etidocaine, D. Tetracaine
B: Prilocaine
Answer: B: Prilocaine 
Explanation: Prilocaine have only intermediate duration and potency (30-90 min). Tetracaine, Bupivacaine, Etidocaine have long duration and potency (>120 min). Ref: Miller Anaesthesia, 5th Edition, Page 586.