This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Interstitial Lung Disease, Subject name: Medicine
Investigation of choice for detection and characterization of interstitial lung disease is- 
Select and explain. 
A. MRI, B. Chest x-ray, C. High resolution CT, D. Ventilation perfusion scan
C: High resolution CT
Answer: C: High resolution CT 
Explanation: Ans. is 'c' i.e.. High resolution CT o High Resolution CT (HRCT) is investigation of choice for interstitial lung disease as it can delineate the lung parenchyma upto the level of secondary pulmonary lobule.