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
[{'content': 'Mechanism of action of cephalosporin is: \nSelect and explain. \nA. Inhibition of beta-lactamase., B. Inhibition of the synthesis of precursors of peptidoglycan., C. Interference with the synthesis of ergosterol., D. Inhibition of transpeptidation reaction.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]