This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Protein Synthesis Inhibitors, Subject name: Pharmacology
Linezolid inhibits bacterial protein synthesis by : 
Select and explain. 
A. Binds to the 23S fraction of the 30S ribosome at P site, B. Binds to the 23S fraction of the 50S ribosome at A site, C. Binds to the 23S fraction of the 30S ribosome at A site, D. Binds to the 23S fraction of the 50S ribosome at P site
D: Binds to the 23S fraction of the 50S ribosome at P site
Answer: D: Binds to the 23S fraction of the 50S ribosome at P site 
Explanation: Linezolid : Inhibits bacterial protein synthesis By acting at an early step and a site different from that of other AMAs. Binds to the 23S fraction P site of the 50S ribosome and interferes with formation of the ternary N- formylmethionine-tRNA (tRNAfMet) -70S initiation complex Binding of linezolid distos the tRNA binding site Overlapping both 50S and 30S ribosomal subunits and stops protein synthesis before it stas