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
Sulfonamide is conjugated with 
Select and explain. 
A. Acetylation, B. Methylation, C. Hydroxylation, D. None
A: Acetylation
Answer: A: Acetylation 
Explanation: Ref-KDT 6/e p683 Acetylation describes a reaction that introduces an acetyl functional group into a chemical compound .