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': 'Chest X-ray showing opacity in the lung with irregular calcification is suggestive of – \nSelect and explain. \nA. Lung carcinoma, B. Hamartoma, C. Hydatid cyst, D. Adenoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Irregular central calcification is characteristic of hamartoma.', 'role': 'assistant'}]