This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'All are true regarding Mechanism of action except: \nSelect and explain. \nA. Chloramphenicol - Protein synthesis, B. Tetracycline - Cell wail synthesis, C. Metronidazole -- DNA, D. Penicillin - cell wall synthesis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Basic & Clinical Pharmacology Katzung 12th ed. p.8J8Explanation:Tetracycline inhibits bacterial protein synthesis by- binding to 30S ribosomal subunit. The remaining drugs are matched correctly with their mechanism of action.', 'role': 'assistant'}]