If $1, \omega, \omega^2$ are the cube roots of unity, then :<br> $\Delta = \begin{vmatrix} 1 & \omega^n & \omega^{2n} \\ \omega^n & \omega^{2n} & 1 \\ \omega^{2n} & 1& \omega^n \end{vmatrix}$ <br> is equal to :

Question

( A ) $\omega^2$
( B ) $0$
( C ) $\omega$
( D ) $1$