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) 1/4√2 (2) 1/3√2 (3) 1/2√2 (4) 1/√2