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
Which of the following non ionizing radiations is used in MRI- 
Select and explain. 
A. Visible light, B. Microwaves, C. Infrared, D. Radio waves
D: Radio waves
Answer: D: Radio waves 
Explanation: 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.