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: Medicine
Investigation of choice for interstitial disease is: 
Select and explain. 
A. Chest X-ray, B. HRCT, C. Gallium-67 DTPA scan, D. MRI
B: HRCT
Answer: B: HRCT 
Explanation: Answer is B (NRCT): High Resolution CT (HRCT) is investigation of choice for interstitial lung disease and bronchiectasis as it can delineate the lung parenchyma upto the level of secondary pulmonary lobule.