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': 'Drugs causing nephrotoxicity are : a) Gentamicin b) Cloxacillin c) Phenacetin d) Erythromycin e) Doxycycline \nSelect and explain. \nA. ac, B. b, C. bd, D. ad', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]