This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Anatomy
[{'content': 'Not true regarding Hydatid cyst of lung \nSelect and explain. \nA. Never ruptures, B. Calcification is common, C. More common in lower lobes, D. Always associated with cyst in liver', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lung in the IInd MC site for hydrated cyst (Liver is the 1st) Only 10% of pulmonary cyst are associated with hepatic cyst. About 20% of pulmonary cysts are bilateral. Usually seen in the lower lobes of lung. Calcification in rare (Note that the calcification is very common in hydatid cyst of liver). It may rupture into the bronchial tree or the peritoneal cavity. ref : harrison 16e p1275', 'role': 'assistant'}]