This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
Which enzyme metabolizes succinylcholine? 
Select and explain. 
A. Acetyl cholinesterase, B. Butyryl cholinesterase, C. Tissue esterase, D. Nonspecific esterase
B: Butyryl cholinesterase
Answer: B: Butyryl cholinesterase 
Explanation: Liver produces an enzyme called Butyrylcholinesterase and release in plasma called plasma cholinesterase or Pseudocholinesterase. Succinylcholine is metabolized by butyrylcholinesterase/plasmacholinesterase/pseudocholinesterase. drugs metabolized by pseudocholinesterase 1. succinylcholine 2. Mivacurium 3. ester local anaesthetics