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': 'The major difference between X–Rays and Light is – \nSelect and explain. \nA. Energy, B. Mass, C. Speed, D. Type of wave', 'role': 'user'}, {'content': "Answer: A \nExplanation: The major difference between X-Rays and light is the 'energy' in each photon. An X-Ray photon has about 5000 times the energy than an ordinary light photon.\nMajor difference between X- rays & visible light:-\n\n\nWavelength\nEnergy", 'role': 'assistant'}]