<prompt> Which one of the following statement is false about loculated pleural effusion?They form obtuse angles against the mediastinumchest wall when viewed in profileThey have unsharp margins when viewed enfaceThey do not conform to segmental distributionThe opacity may show air bronchogram  <response>: 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 