This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Radiology, Subject name: Radiology
[{'content': 'Necrotic nodules in lung are seen in- \nSelect and explain. \nA. TB, B. Sarcoidosis, C. RA, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Necrotic nodules in lung are seen in Infective causes: TB, histoplasmosis, syphilis, coccidiomycosis, Cat's scratch disease Non- Infective causes: Wegner's granulomatosis, Sarcoidosis, hyalinizing granuloma, idiopathic bronchocentric granulomatosis, RA Non-Necrotic lesion/ Non cavitating lesion: Pulmonary Hamaoma: Popcorn Calcifications", 'role': 'assistant'}]