This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Alveolar Lung Disease, Subject name: Radiology
[{'content': 'A3 year old non-vaccinated child presented with fever and fast breathing. His mother told that he has recently developed measles rash. CXR shown below is indicative of which infection? \nSelect and explain. \nA. Staphylococcus aureus, B. Staphylococcus Albus, C. Streptococcal pneumoniae, D. Streptococcal viridans', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Staphylococcus AureusThe Chest X Ray shows a cystic cavity in right upper zone indicative of infection with a virulent organism. In setting of recovery from measles the organism responsible is Staphylococcus Aureus.', 'role': 'assistant'}]