If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is
5' - A T G A A T G - 3'
the sequence of bases in its RNA transcript would be

Option (a) gives the correct sequence of bases in the RNA transcript for the given DNA coding strand.
5' - A T G A A T G - 3' (coding strand)
                ↓
3' - T A C T T A C - 5' (template strand)
                ↓
5' - A U G A A U G - 3' (RNA)