Q: Which electromagnetic radiation is used to kill cancer cells?


Read this paragraph and choose the correct option from the provided answers:

X rays and gamma rays are the electromagnetic waves with the shortest wavelengths and highest frequencies. X rays are used in medicine and dentistry and to screen luggage at airports. Gamma rays are used to kill cancer cells.

 Choices:

- ultraviolet rays

- X-rays

- plasma rays

- gamma rays


A:
gamma rays