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
All of the following drugs are metabolised by acetylation except 
Select and explain. 
A. INH, B. Sulfonamides, C. Ketoconazole, D. Hydralazine
C: Ketoconazole
Answer: C: Ketoconazole 
Explanation: Ans. is 'c' i.e. Ketoconazole Drugs undergoing Acetylation-SulfonamidesIsoniazidPASHydralazineProcainamideAlso knowDrugs undergoing glucuronide conjugationChloramphenicolAspirinPhenacetinMorphineMetronidazoleDrugs undergoing Glycine conjugationSalicylates andOther drugs with Carboxyl groupDrugs undergoing Glutathione conjugationParacetamol.