What are 6 possible mutagens?

Six possible mutagens are:

1. Reactive chemicals (reactive oxygen species, bromine, benzene, alkaloid ...)

2. Physical mutagens (radiation like X rays or ultraviolet radiation, radioactive elements like ¹⁴C)

3. Metals (arsenic, cadmium, chromium, nickel ...)

4. Intercalating agents (ethidium bromide)

5. Base analogues

6. Biological mutagens (viruses, bacteria, transposons)