Under which of the following conditions there will be no change in the reading frame of following mRNA?
5'AACAGCGGUGCUAUU 3'

Options

A. Insertion of G at `5^(th)` position
B. Deletion of G from`5^(th)` position
C. Insertion of A at G at `4^(th) and 5^(th)` positions respectively
D. Deletion of GGU from `7^(th), 8^(th) and 9^(th)` positions