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 of the following antitubercular drugs do not need to be adjusted in presence of renal failure ? 
Select and explain. 
A. Rifampicin, B. INH, C. Ethambutol, D. Pyrazinamide
A: Rifampicin
Answer: A: Rifampicin 
Explanation: Ans. is 'a' i.e., Rifampicin o Antitubercular drugs which do not require dose adjustment in renal failure : Rifampicin Rifabutin Rifapentine