This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Local and Regional Anesthesia), Subject name: Anaesthesia
Which of the following is an ester: 
Select and explain. 
A. Chlorprocaine, B. Bupivacaine, C. Dibucaine, D. Prilocaine
A: Chlorprocaine
Answer: A: Chlorprocaine 
Explanation: Ans: (a) ChlorprocaineESTER and AMIDESEster (one Tin name)Amides (2 Tin name)* Cocaine* Benzocaine* Chlorprocaine* Tetracaine* Lignocaine* Bupivacaine* Prilocaine* Dibucaine* EtidocaineRemember: Amide group of LA contain "2 i" in their names.* All LA causes causes vasodilation and hypotension, EXCEPT Cocaine. It causes vasoconstriction and significant rise in BP.