Under which of the following conditions will there be no change in the reading frame of following $mRNA$ $ 5’AACAGCGGUGCUAUU3’$

• A

  Insertion of $G$ at $5^{\text {th }}$ position

• B

  Deletion of $G$ from $5^{\text {th }}$ position

• C

  Insertion of $\mathrm{A}$ at $\mathrm{G}$ at $4^{\text {th }}$ and $5^{\text {th }}$ positions respectively

• D

  Deletion of $GGU$ from $7^{\text {th }}, 8^{\text {th }}$ and $9^{\text {th }}$ positions