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. Pleuropericardial cyst, D. Enterogenous cyst', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pleuropericardial cyst has many synonyms: pericardial cyst, coelomic cyst, spring water cyst, serosal cyst, mesothelial\xa0cyst, parapericardial cyst, simple cyst, and hydrocele of the mediastinum.', 'role': 'assistant'}]