The statement that is true is:
Neutral mutations occur when a mutation in a DNA region results in the same sequence as the original.
Neutral mutations are changes in the genetic sequence that do not significantly affect the organism's fitness or phenotype, meaning they neither provide an advantage nor a disadvantage. This can occur when a mutation does not alter the amino acid sequence of a protein due to the redundancy of the genetic code or when it occurs in a non-coding region of DNA.