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
All of the following drugs act on nucleic acids except 
Select and explain. 
A. Fluroquinolones, B. Linezolide, C. Rifampicin, D. Nalidixic acid
B: Linezolide
Answer: B: Linezolide 
Explanation: Ref KDT 7th /689 Linezolide act by inhibiting cell wall synthesis whereas quinolone inhibit DNA gyrase and Rifampicin inhibit RNA polymerase