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 is phase - II drug metabolic reaction - 
Select and explain. 
A. Oxidation, B. Cyclization, C. Methylation, D. Hydrolysis
C: Methylation
Answer: C: Methylation 
Explanation: Ans. is 'c' i.e., Methylation .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.