This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'Water-lily sign on chest X-ray is seen in - \nSelect and explain. \nA. TB, B. Aspergillosis, C. Hydatidcyst, D. Cryptococcosis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Hydatid cystRadiological signs of hydatid cvst of lung1) Meniscus sign4) Rising sun sign2) Water-lilly sign5) Serpent sign3) Camalote sign6) Empty cyst sign", 'role': 'assistant'}]