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
[{'content': 'Investigation of choice for interstitial disease is: \nSelect and explain. \nA. Chest X-ray, B. HRCT, C. Gallium-67 DTPA scan, D. MRI', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]