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 of the following antibiotics is least Nephrotoxic? \nSelect and explain. \nA. Streptomycin, B. Gentamycin, C. Polymixin B, D. Doxycycline', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Doxycycline is metabolized in the liver and excreted through the bile and not kidney and hence it is not nephrotoxic. Ref: KDT, 6th Edition, Pages 713, 721, 734; Drug Injury: Liability, Analysis and Prevention, 2nd Edition, Page 438', 'role': 'assistant'}]