JEE Math Practice Question

If L1 is the line of intersection of the planes 2x - 2y + 3z - 2 = 0, x - y + z + 1 = 0 and L2 is the line of intersection of the planes x + 2y - z - 3 = 0, 3x - y + 2z - 1 = 0, then the distance of the origin from the plane, containing the lines L1 and L2, is :

1. A.$${1 \over {\sqrt 2 }}$$
2. B.$${1 \over {4\sqrt 2 }}$$
3. C.$${1 \over {3\sqrt 2 }}$$
4. D.$${1 \over {2\sqrt 2 }}$$