# The following two lines are $\large\frac{x-1}{2}=\frac{y-1}{-1}=\frac{z}{1}$ and $\large\frac{x-2}{3}=\frac{y-1}{-5}=\frac{z-1}{2}$ is
$\begin{array}{1 1}(1)parallel &(2)intersecting\\(3)skew&(4)perpendicular\end{array}$