If the lines $\large\frac{x-1}{2}=\frac{y+1}{k}=\frac{z}{2}$ and $\large\frac{x+1}{5}=\frac{y+1}{2}=\frac{z}{k}$ are co planar then the plane containing these two lines is?,

Question

$\begin{array}{1 1} (a)\:\:y+2z+1=0\:\:\qquad\:(b)\:y+z+1=0\:\:\qquad\:(c)\:y-z+1=0\:\:\qquad\:(d)\:y-2z+1=0 \end{array} $