Which of the following mutations would most likely be identified as a chromosomal translocation?

A sequence of bases encodes for genes XXY. A portion of another chromosome breaks off and inserts within genes XYZ.

A mutation occurs while copying a chromosome. Instead of reading EFGHI, the chromosome reads EFGFGHI.

The genetic sequence is MNOPQ. A mutation occurs and the sequence of bases that encodes for gene N is not copied.

The sequence of bases on the mRNA reads CUU and codes for the amino acid Leucine. A mutation occurs and the mRNA sequence changes to CCU and now codes for the amino acid Proline.