This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy Pa 2, Subject name: Radiology
Radioisotopes produce all the following except? 
Select and explain. 
A. Alpha rays, B. Beta Rays, C. X rays, D. Gamma Rays
C: X rays
Answer: C: X rays 
Explanation: Radioactive elements emit Alpha Rays, Beta and Gamma Rays. X-rays are produced when fast moving electrons from cathode strike the target of Anode of Xray Tube.