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
Quinuspristine/dalfopristine act by - 
Select and explain. 
A. Inhibiting cell wall synthesis, B. Inhibiting protein synthesis, C. Inhibiting folic acid, D. Acts on cell membrane
B: Inhibiting protein synthesis
Answer: B: Inhibiting protein synthesis 
Explanation: Ans. is 'b' i.e., Inhibiting protein synthesis These drugs inhibit protein synthesis by binding to 50 ',S" ribosome. o These drugs also inhibit t-RNA synthetase activity.