This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Interstitial Lung Disease, Subject name: Radiology
"Signet ring appearance'- on CT is seen in- 
Select and explain. 
A. Bronchitis, B. Bronchiectasis, C. Emplysema, D. Bronchogenic Carcinoma
B: Bronchiectasis
Answer: B: Bronchiectasis 
Explanation: None