This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cell Wall Synthesis Inhibitors, Subject name: Pharmacology
Mechanism of action of vancomycin is: 
Select and explain. 
A. Cell wall synthesis inhibition, B. Protein synthesis inhibition, C. Increase in membrane permeability, D. Inhibition of folic acid metabolism
A: Cell wall synthesis inhibition
Answer: A: Cell wall synthesis inhibition 
Explanation: Vancomycin is a transglycosylase inhibitor, used in treatment of MRSA. Other cell wall inhibitors include:Fosphomycin , beta lactams, bacitracin, cycloserin, vancomycin.