This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Acetylcholine is not used commercially because: 
Select and explain. 
A. Long duration of action, B. Costly, C. rapidly destroyed in the body, D. Crosses blood brain barrier
C: rapidly destroyed in the body
Answer: C: rapidly destroyed in the body 
Explanation: Ref:KD Tripathi pharmacology 7th edition (page.no: 99) ACh is hydrolyzed by the enzyme cholinesterase and choline is recycled. A specific (Acetylcholinesterase-AChE or true cholinesterase) and a nonspecific (Butyrylcholinesterase-BuChE or pseudocholinesterase) type of enzyme occur in the body. So Ach is rapidly destroyed in the body