<prompt> Hyperanslucency of lung unilaterally is seen on all except :PneumothoraxResection of mammary glandPulm a. obstructionPneumonectomy  <response>: D i.e. Pneumonectomy Pulmonary agenesisQ PneumonectomyQ are the causes of radiopaque lung with IL mediastinal shiftQ. Pulmonary aery obstruction i.e. Pulmonary embolism lt radiolucent lungQ. 