Let $\mathrm{z}=\left(\frac{\sqrt{3}}{2}+\frac{\mathrm{i}}{2}\right)^5+\left(\frac{\sqrt{3}}{2}-\frac{\mathrm{i}}{2}\right)^5$. If $\mathrm{R}(\mathrm{z})$ and $\mathrm{I}(\mathrm{z})$ respectively denote the real and imaginary parts of z , then
Select the correct option:
A
$I(z)=0$
B
$R(z)>0$ and $I(z)>0$
C
$\mathrm{R}(\mathrm{z})<0$ and $\mathrm{I}(\mathrm{z})>0$
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