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: Pharmacology
All of the following reactions are catalyzed by microsomal enzymes EXCEPT: 
Select and explain. 
A. Glucuronidation, B. Acetylation, C. Oxidation, D. Reduction
B: Acetylation
Answer: B: Acetylation 
Explanation: - Acetylation is done by N-acetyl transferase which is a non-microsomal enzyme.
- Most of the Phase 1 reactions and Glucuronidation is done by microsomal enzymes.