Answer:
Option C
Step-by-step explanation:
Mutagenic exposure can causes changes in the structure of the DNA. These changes are primarily chemical changes which can causes absurd mutations which can be harmful as well.
For example - cancer is caused due to mutagenic change in DNA.
Exposure of radioactive substance such as x-rays, ultraviolet radiation and radioactive chemicals such as uranium causes mutation in the genes.
Hence, option C is correct