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
Best method for detecting minimal bronchiectasis is: 
Select and explain. 
A. Bronchogram, B. CT scan, C. Radionuclide lung scan, D. Chest X-ray
B: CT scan
Answer: B: CT scan 
Explanation: Ans. CT scan