This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Radiology, Subject name: Radiology
Kerley B lines are seen in 
Select and explain. 
A. Pulmonary edema, B. Congenital hea disease, C. Sarcoidosis, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Kerley A lines are 1-2mm non- branching lines radiating from the hilum, 2-6 cm long. They represent thickened deep interlobular septa. Kerley B lines are transverse non- branching 1-2 mm lines at the lung bases perpendicular to the pleura 1-3cm long. They represent thickened interlobular septa.