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': 'Floating water–Lily sign is feature of – \nSelect and explain. \nA. Lung hydatid, B. Bronchial adenoma, C. Lung abscess, D. Aspergilloma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Water - Lily sign, also refered as camalote sign, is seen in ruptured hydatid cyst (echinococcosis) of lung.', 'role': 'assistant'}]