Maximum and minimum values of $\sin^2(120^{\circ} + \theta) + \sin^2(120^{\circ} - \theta)$ are respectively :

Question

( A ) $\frac{3}{2}, 0$
( B ) $\frac{3}{2}, \frac{1}{2}$
( C ) $\frac{1}{2}, 0$
( D ) $\frac{3}{2}, \frac{1}{3}$