This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
[{'content': 'Necrotic lung nodules on chest Xray are seen in \nSelect and explain. \nA. TB, B. RA, C. Sarcoidosis, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Necrobiotic pulmonary nodules are sterile cavitating lung nodules associated with inflammatory bowel disease and rheumatoid ahritis Histologically, necrobiotic nodules consist of a core of fibrinoid necrosis and sterile aggregate of numerous epithelioid histiocytes arranged in indistinct nodules with an infiltrate of lymphocytes, plasma cells and multinucleated giant cells.(Ref: Chapman and Nakielny's Aids to Radiological Differential Diagnosis 6thEtd, page no.85)", 'role': 'assistant'}]