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': 'Popcorn calcification is characteristically seen in \nSelect and explain. \nA. TB, B. Metastasis, C. Fungal invagination, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A, B, C i.e. Sarcoidosis, Silicosis, Pneumoconiosis, Lymphoma following radiation treatment', 'role': 'assistant'}]