This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacokinetics, Subject name: Pharmacology
Which of the following is phase-2 reaction - 
Select and explain. 
A. Oxidation, B. Reduction, C. Cyclination, D. Acetylation
D: Acetylation
Answer: D: Acetylation 
Explanation: Ans. is 'd' i.e., Acetylation o Phase I reactions: - Oxidation, reduction, hydrolysis, cyclization, decyclization.o Phase II reactions: - Acetylation, glutathione conjugation, glucoronide conjugation (glucuranization), glycine conjugation, methylation, sulfate conjugation (sulfuranation), nucleotide synthesis.