This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which antitubercular drug metabolism is under genetic control - 
Select and explain. 
A. Rifampicin, B. INH, C. Cyclosporine, D. PZM
B: INH
Answer: B: INH 
Explanation: Ans. is 'b' i.e., INH o INH is metabolized by liver by acetylations and metabolites are excreted in urine. The rate of acetylation of INH is under genetic control. The variations.