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': 'Egg shell calcification are seen: \nSelect and explain. \nA. Sillicosis, B. T.B., C. Carcinoma metastatic to Lymphonode, D. Lymphoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Pleuro-pericardial cyst Spring water cyst also k/a Pleuro-pericardial cystQ or pericardial coelomic cystQ is most commonly found in pericardiophrenic angle more often on right side. Hydatid cyst is also k/a Water-lilly/Camalotte cystQ', 'role': 'assistant'}]