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': 'Spring water cyst is another name for: \nSelect and explain. \nA. Hydatid cyst of lung, B. Lung amoebic cyst, C. Pleuro pericardial cyst, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Pleuro-pericardial cyst', 'role': 'assistant'}]