This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, 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: Ans. b (Hamartoma) (Ref. Harrison\'s medicine 17lh/558)Opacity in the lung with irregular calcification, i.e., poporn calcification = Hamartoma.The calcification of hamartomas can be stippled or conglomerate, referred to as "popcorn" calcification.# Opacity in the lung with "Bull\'s eye" calcification Lung granuloma# Opacity in lung with "Air crescent" SignAspergilloma (fungal ball).# Asympyomatic opacity in the lung without calcification can be Adenoma & bronchial atresia.# Opacity in the lung with corona radiate and or amorphous calcification Lung carcinoma# Opacity in lung with \'cyst in cyst\'/floating water lilly/Callomate signHydatid cyst.# Opacity in the lung without calcification (if at all present-is arc-like) Hydatid cyst Also know:Carney\'s triad: multiple pulmonary chondromas + gastric epithelioid + extra-adrenal pheochromocytomas paragan- glioma.', 'role': 'assistant'}]