The value of $\begin{pmatrix}\frac{1-\sqrt{3}i }{2}\end{pmatrix}^{36} + \begin{pmatrix}\frac{-1 -\sqrt{3} i }{2}\end{pmatrix}^{36} $ is equal to :

Question

( A ) 2
( B ) 0
( C ) 3
( D ) 1