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
Ground glass appearance is not seen in – 
Select and explain. 
A. Hyaline membrane disease, B. Left to right shunts, C. Pneumonia, D. Obstructive TAPVC
B: Left to right shunts
Answer: B: Left to right shunts 
Explanation: Ground grass appearance is seen in right to left shunt (not in left to right shunt).
All other options, pneumonia (interstitial pneumonia), HMD, and obstructive TAPV, can cause ground glass appearance.