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
Which one of the following statement is false about loculated pleural effusion? 
Select and explain. 
A. They form obtuse angles against the mediastinum/chest wall when viewed in profile, B. They have unsharp margins when viewed enface, C. They do not conform to segmental distribution, D. The opacity may show air bronchogram
D: The opacity may show air bronchogram
Answer: D: The opacity may show air bronchogram 
Explanation: Air bronchogram is the bronchi filled with air visualised against the surrounding opacified alveoli. Ref: Perinatal and Pediatric Respiratory Care By Brian K. Walsh, Michael P. Czervinske, Robe M. DiBlasi, 2009, Page 445