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
[{'content': 'All of the following antibodies require dose adjustment in renal failure except? \nSelect and explain. \nA. Ceftriaxone, B. Isoniazid, C. Erythromycin, D. Gentamicin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rifampicin, Erythromycin, Doxycycline, Nafcillin, Cefoperazone are metabolized by liver and are safe in renal failure.', 'role': 'assistant'}]