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
| energy linear acceleration used in 
Select and explain. 
A. X-ray, B. Cathode rays, C. Photon rays, D. a- rays
A: X-ray
Answer: A: X-ray 
Explanation: A i.e. X-ray