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
Linear accelerator produces 
Select and explain. 
A. X-rays, B. γ-rays, C. α-particles, D. β-particles
A: X-rays
Answer: A: X-rays 
Explanation: X-rays - Linear accelerator.
γ-rays - emitted by radioactive materials.