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
The mechanism of antibacterial action of cephalosporins involves : 
Select and explain. 
A. Inhibition of the synthesis of precursors of peptidoglycan, B. Interference with the synthesis of ergosterol, C. Inhibition of transpeptidation reaction, D. Inhibition of beta-lactamase
C: Inhibition of transpeptidation reaction
Answer: C: Inhibition of transpeptidation reaction 
Explanation: None