Which of the following is a mutagen?

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(D) mutagen is a physical or chemical agent that increases the rate of mutation in an organism.$UV$ radiation is a well-known physical mutagen that ca

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$UV$ radiation

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(D) mutagen is a physical or chemical agent that increases the rate of mutation in an organism.$UV$ radiation is a well-known physical mutagen that causes the formation of pyrimidine dimers in $DNA$,leading to mutations.Cold,heat (in moderate ranges),and water are not considered mutagens in the context of biological genetics.

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