Under which of the following conditions will there be no change in the reading frame of the following mRNA?
5'AACAGCGGUGCUAUU 3'
1. | Deletion of GGU from 7th, 8th and 9th positions |
2. | Insertion of G at the 5th position |
3. | Deletion of G from the 5th position |
4. | Insertion of A and G at the 4th and the 5th positions respectively |