If the DNA codons are ATG ATG ATG and a cytosine base is inserted at the beginning, which of the following will result?

Q. If the DNA codons are ATG ATG ATG and a cytosine base is inserted at the beginning, which of the following will result?

A.            CA TGA TGA TG

B.            CATG ATG ATG

C.            CAT GAT GATG

D.            A non-sense mutation

Answer: CAT GAT GATG