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': 'All of the following drugs act on nucleic acids except \nSelect and explain. \nA. Fluroquinolones, B. Linezolide, C. Rifampicin, D. Nalidixic acid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref KDT 7th /689 Linezolide act by inhibiting cell wall synthesis whereas quinolone inhibit DNA gyrase and Rifampicin inhibit RNA polymerase', 'role': 'assistant'}]