What type of mutation has occurred in the following example? Original DNA sequence С т с Original amino acid sequence Glutamic acid Mutated DNA sequence C T C New mRNA sequence G A G New amino acid Glutamic acid GG с Proline G G G С С С Proline T A G Isoleucine T A G A U с Isoleucine G C A Arginine G С A С G U Arginine A) frameshift mutation (due to deletion) B) nonsense mutation C) silent mutation