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: Pediatrics
[{'content': 'Most likely etiology in 10 month old child with high grade fever since 7 days, with the following x-ray finding and not responding to ceftriaxone \nSelect and explain. \nA. Streptococcus pneumoniae, B. Staphylococcus aureus, C. Mycoplasma, D. Respiratory Syncytial Virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Streptococcus pneumoniae and staphylococcus aureus both can lead to consolidation of a lobe of lung as seen in the Chest x-ray. But Resistance to Ceftriaxone is seen in staphylococcus aureus only.', 'role': 'assistant'}]