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': 'Which can be given safely in renal failure ? \nSelect and explain. \nA. Tetracycline, B. Gentamicin, C. Amphotericin B, D. Doxycycline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]