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
Mechanism of action of vancomycin is : 
Select and explain. 
A. Inhibition of cell wall synthesis, B. Inhibition of protein synthesis, C. Leakage from cell membrane, D. Inhibition of DNA gyrase
A: Inhibition of cell wall synthesis
Answer: A: Inhibition of cell wall synthesis 
Explanation: None