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
All of the following are true about loculated pleural effusion except: 
Select and explain. 
A. It makes an obtuse angle with the chest wall, B. The margins are clear when viewed in face, C. Not confined to any broncho pulmonary segment, D. Air bronchogram is seen within the opacity
D: Air bronchogram is seen within the opacity
Answer: D: Air bronchogram is seen within the opacity 
Explanation: Ans. Air bronchogram is seen within the opacity