Which one of following is a wrong statement regarding mutations?

A frameshift mutation is insertion or deletion of nucleotides, the number of altered bases are not in multiples of three. Cancer cells are characterised by the presence of abnormal chromosomes numbers (aneuploidy) and structural chromosomal rearrangements. UV, X-rays or $?$-rays introduce genetic mutation by breaking chromosomes or altering the DNA base and are called mutagens. This mutation in DNA are inherited to the progeny. Mutation in single nucleotide base of a DNA segment is called as a point mutation. It can introduce a premature stop codon, or a nonsense codon in the transcribed mRNA (nonsense mutation) or changes a codon specifying a different amino acid (missense mutation).