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 antimicrobial agent do not require reduction in dose in patient with renal failure- 
Select and explain. 
A. Rifampicin, B. Fluconazole, C. Vancomycin, D. Imipenem
A: Rifampicin
Answer: A: Rifampicin 
Explanation: Ans. is 'a' i.e., Rifampicin Antimicrobials that do not require dose reduction in renal failure Cephalosporins Fluoroquinolones Cefoperazone o Trovafloxacin Ceftriaxone o Grepafloxacin Cefopiramide o Pefloxacin Macrolides o Moxifloxacin o Erythromycin o Clarithromycin o Azithromycin Other (Miscellaneous) Tetracycline o Clindamycin o Docycycline o Chloramphenicol Minocycline o Metronidazole Antitubercular o Linezolid o Rifampicin o Quinupristin/Dalfopristin o Rifapentine o Nafcillin/Oxacillin o Rifabutin o Penicillins