If $\alpha\:\:and\:\:\beta$ are the roots of $2x^2-2(1+n^2)x+(1+n^2+n^4)=0$, then the value of $\alpha^2+\beta^2=?$

Question

$\begin{array}{1 1} 2 \\ n^2 \\ 2n^2 \\ 2n^4 \end{array}$