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 beta-Lactam antibiotics would be \nSelect and explain. \nA. Inhibition of bacterial protein synthesis by binding to subunit of bacterial ribosomes, B. Inhibition of cell wall peptidoglycan synthesis by competitive inhibition of transpeptidases, C. Reduced drug causes strand breaks in DNA., D. Inhibition of DNA synthesis by inhibiting DNA-Dependent RNA Polymerase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]