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
Cholinesterase metabolizes following except – 
Select and explain. 
A. Tetracaine, B. Procaine, C. Acetylcholine, D. Bupivacaine
D: Bupivacaine
Answer: D: Bupivacaine 
Explanation: Ester local anesthetics (like procaine & tetracaine) are metabolized by cholinesterase (pseudocholinesterase). Amide local anesthetics (Bupivacaine) are metabolized in liver (not by pseudocholinesterase).
Acetylcholine is metabolized by cholinesterase (acetylcholinesterase).