<prompt> Which of the following is an example of a phase 1 Xenobiotic reaction? RepeatAcetylationHydroxylationMethylationGlucuronidation  <response>: Ans: B Hydroxylation Ref: The Pharmacological basis of therapeutics by Goodman Gilman - 12th ed, page no. 125Explanation:Hydroxylation is an example for phase 1 reaction while.Acetylation, glucuronidation and methylation are examples of conjugation reactions which are phase 2 reactions. See Table 7 