If \[1,\omega ,{{\omega }^{2}},{{\omega }^{3}}.......,{{\omega }^{n-1}}\] are the \[n,{{n}^{th}}\] roots of unity, then \[(1-\omega )(1-{{\omega }^{2}}).....(1-{{\omega }^{n-1}})\] equals [MNR 1992; IIT 1984; DCE 2001; MP PET 2004]

• A. 0
• B. 1
• C. \[n\]
• D. \[{{n}^{2}}\]