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
Air bronchogram is seen in: 
Select and explain. 
A. Lung abscess, B. Lung cavity, C. Pneumothorax, D. Consolidation
D: Consolidation
Answer: D: Consolidation 
Explanation: Ans. Consolidation