Ans.
Cancer is defined as a state that shows uncontrolled growth of the body cells. These cells travel to the other body organs and destroy normal cells. It is mainly caused by mutations in the genes that regulate cell cycle and cell division, such as proto-oncogenes and tumor-suppressor genes.
Mutagens are those chemical or physical agents that induce mutation in normal genes. Thus, 'increased exposure of mutagens will eventually lead to higher cancer risk in individuals by increasing mutations.'