In mutation breeding, mutations are induced by using radiation like
a. gamma rays
b. X-rays
c. UV-rays

Mutations to create a new character or trait can be artificially induced through the use of chemicals (like hydrazine, methyl methane sulphonate, etc.) or radiations (like X-rays, UV-rays and $\mathrm{\gamma }$-rays, etc). These agents are called as mutagens.