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': 'Water lilly appearance in chest X-ray is suggestive of: \nSelect and explain. \nA. Bronchiectasis, B. Bronchopleural fistula, C. Hydatid cyst, D. Sequestration cyst of lung', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Hydatid cyst', 'role': 'assistant'}]