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
Which drug is not metabolized by acetylation 
Select and explain. 
A. Isoniazide, B. Dapsone, C. Hydralazine, D. Metoclopropramide
D: Metoclopropramide
Answer: D: Metoclopropramide 
Explanation: Impotant drug metabolised by acetylation are S- Sulphonamides including dapsone H-Hydralazine I-Isoniazide P-procainamide Ref-KDT 7/e p24