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': 'IOC for pericardial calcification \nSelect and explain. \nA. CT scan, B. 2D-Echo, C. TEE, D. MRI', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pericardial calcification - CT scan.\nPericardial effusion - 2D echo.', 'role': 'assistant'}]