If DNA base sequence becomes TACAGG because of mutation then

If DNA base sequence becomes T-A-C-A-G-G because of mutation, then what RNA is formed after transcription?

5\' TACAGG 3\' DNA
3\' ATGTCC 5\' DNA (it\'s double stranded, this is the complementary strand that the mRNA is produced from)
5\' UACAGG 3\' mRNA