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: Radiology
[{'content': 'Air bronchogram indicates \nSelect and explain. \nA. Intrapulmonary pathology, B. Pleural pathology, C. Mediastinal pathology, D. All the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Air bronchogram indicates Intrapulmonary pathology.\nIt excludes any pleural and mediastinal pathology.', 'role': 'assistant'}]