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': 'Well defined lesion in the lung with pop corn calcification on X-ray is suggestive of: \nSelect and explain. \nA. Ca lung, B. Adenoma, C. Hamaoma, D. Hvdatid cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Hamaoma', 'role': 'assistant'}]