Question

which is a frameshift mutation? substitution nonsense silent deletion

Explanation:

Frameshift mutations occur due to insertions or deletions of nucleotides that are not in multiples of three, shifting the reading - frame of the genetic code. Substitution is a point - mutation changing one base. Nonsense mutations introduce a stop codon prematurely. Silent mutations do not change the amino - acid sequence. Deletion (if not in a multiple of 3) causes a frameshift.

Answer:

deletion