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': 'All of them use non–ionizing radiation except – \nSelect and explain. \nA. Ultrasonography, B. Thermography, C. MRI, D. Radiography', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Radiography uses X-ray, which is ionizing radiation.', 'role': 'assistant'}]