This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
non synthetic phase 1 reaction for drug detoxification is 
Select and explain. 
A. Glucuronidination, B. Acetylation, C. Methylation, D. Oxidation
D: Oxidation
Answer: D: Oxidation 
Explanation: Ref-KDT 6/e p24-25