This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Magnetic Resonance Imaging, Subject name: Radiology
[{'content': 'Which of the following non ionizing radiations is used in MRI- \nSelect and explain. \nA. Visible light, B. Microwaves, C. Infrared, D. Radio waves', 'role': 'user'}, {'content': "Answer: D \nExplanation: MRI uses a magnetic field and radio waves to create detailed pictures of the body. Unlike CT scans or X-rays, MRI doesn't use Ionizing Radiation.", 'role': 'assistant'}]