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
[{'content': 'All of the following reactions are catalyzed by microsomal enzymes EXCEPT: \nSelect and explain. \nA. Glucuronidation, B. Acetylation, C. Oxidation, D. Reduction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - Acetylation is done by N-acetyl transferase which is a non-microsomal enzyme.\n- Most of the Phase 1 reactions and Glucuronidation is done by microsomal enzymes.', 'role': 'assistant'}]