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: Surgery
[{'content': 'Which is true regarding hydatid cyst of lung - \nSelect and explain. \nA. Never ruptures, B. Calcification is common, C. Always associated with cyst in the liver, D. More common in lower lobes.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Lung in the IInd MC site for hydrated cyst (Liver is the 1st)\nOnly 10% of pulmonary cyst are associated with hepatic cyst.\nAbout 20% of pulmonary cysts are bilateral.\nUsually seen in the lower lobes of lung.\nCalcification in rare (Note that the calcification is very common in hydatid cyst of liver).\nIt may rupture into the bronchial tree or the peritoneal cavity.', 'role': 'assistant'}]