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': 'A 14-year-old boy present with headache, fever, and cough for 2 days. Sputum is scant and non-purulent and gram stain reveals many white cells but no organisms. The treatment should be initiated with : \nSelect and explain. \nA. Cefazolin, B. Erythromycin, C. Amikacin, D. Trovafloxacin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]