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 is seen in: \nSelect and explain. \nA. Lung abscess, B. Lung cavity, C. Pneumothorax, D. Consolidation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Consolidation', 'role': 'assistant'}]