This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Which antibiotic acts by inhibiting protein synthesis? \nSelect and explain. \nA. Cefotetan, B. Doxycycline, C. Ciprofloxacin, D. Oxacillin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Inhibit protein synthesis: Tetracycline,Chloramphenicol, Erythromycin, Clindamycin, Linezolid. ESSENTIALS OF MEDICAL PHARMACOLOGY page no. 690', 'role': 'assistant'}]