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
Chest X-ray showing opacity in the lung with irregular calcification is suggestive of – 
Select and explain. 
A. Lung carcinoma, B. Hamartoma, C. Hydatid cyst, D. Adenoma
B: Hamartoma
Answer: B: Hamartoma 
Explanation: Irregular central calcification is characteristic of hamartoma.