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. Pulmonary hamartoma, D. Fungal invagination', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Popcorn calcification is characteristic of hamartoma.', 'role': 'assistant'}]