This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Elaboration of inactivating enzymes are the impoant mechanism of drug resistance among all of these antibiotics except \nSelect and explain. \nA. Quinolone, B. Pencillin, C. Chloramphenicol, D. Aminoglycoside', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer KDT 6/e p688 Resistance to fluoroquinolone is mediated by mutation in DNA gyrase', 'role': 'assistant'}]