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': 'Tetracyclines inhibit protein synthesis by : \nSelect and explain. \nA. Inhibition of initiation and misreading of mRNA, B. Binding to 30 S subunit and inhibiting the binding of aminoacyl–tRNA to A site, C. Inhibiting peptidyl transferase activity, D. Inhibiting translocation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]