Final answer:
The correct example of a mutagen from the options is UV radiation, which can cause changes in DNA. RNA is important for protein synthesis and is not a mutagen, while oxygen does not typically cause mutations. Thus, UV radiation is the answer.
Explanation:
Understanding Mutagens
A mutagen is an agent that causes changes to the DNA in an organism, potentially leading to mutations. Among the options provided in the question, UV radiation is a well-known mutagen. It can cause damage to the DNA by creating thymine dimers, which can result in mutations if not repaired properly.
On the other hand, RNA is not a mutagen; it is a molecule essential for protein synthesis and does not cause mutations itself. Additionally, oxygen generally does not act as a mutagen, although reactive oxygen species can lead to oxidative damage, they are not classified as traditional mutagens.
Conclusion
In summary, the correct answer to the question is UV radiation as it fits the definition of a mutagen.
Learn more about mutagen here:
https://brainly.com/question/50880814