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
[{'content': 'A patient presents with the clinical features of interstitial lung disease. How will you confirm the diagnosis: September 2007, 2010 \nSelect and explain. \nA. CT scan, B. X - Ray, C. Bronchoscopy, D. MRI', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: CT Scan CT scans are often the first diagnostic step for interstitial lung disease and may also help rule out other conditions that may cause similar symptoms. Pulmonary function tests (PFTs) are noninvasive tests that measure the function of the lungs. Spirometer can measure the volume of the lungs as well as the air flow into and out of the lungs. Biopsies or washings may be taken of the lungs and airways during bronchoscopy.', 'role': 'assistant'}]