If x4 - 6x2 - 1 = 0, then the value of x^6 - 5x^2 + 5x^2 - 1x^6 + 5 is:

Answer: Option B

$$\begin{array}{rl}& x^4-6x^2-1=0,\\ & x^2\left(x^2-6-\frac{1}{x^2}\right)=0\\ & x^2-\frac{1}{x^2}=6\\ & x^6-\frac{1}{x^6}=216+18=234\\ & x^6-\frac{1}{x^6}-5\left(x^2-\frac{1}{x^2}\right)+5\\ & =234-30+5\\ & =209\end{array}$$