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
[{'content': 'Ground glass appearance is not seen in \nSelect and explain. \nA. Hyline membrane disease, B. Left to right shunts, C. Pneumonia, D. Obstructive TAPVC', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Left to Right Shunt Ground Glass Appearance It is radiological marker of pathology in air space or interstitiumQ. Presents with increased lung density which on chest X Ray obscures broncho vesicular markings (but present on CT ; if bronchial & vascular markings are absent both in X Ray & CT then k/a consolidation) Total Anomalous Pulmonary Venous Drainage (TAPVD) Due to Interstial & alveolar edema caused by pulmonary venous hypeension Obstructed TAPVD usually presents in neonatal period with cynosis and severe respiratory distress and it is difficult to differentiate it from pulmonary hypeension & severe pulmonary disease.', 'role': 'assistant'}]