The image of plane `2x-y+z=2` in the plane mirror `x+2y-z=3` is (a)`x+7y-4x+5=0` (b) `3x+4y-5z+9=0` (c)`7x-y+2z-9=0` (d) None of these

The equation of the plane through intersectioof planes x=2y+3z=4 and 2x+y-z=-5 and perpendicular to the plane 5x+3y+6z+8=0 is (A) 7x-2y+3x+81=0 (B) 23x+14y-9z+48=0 (C) 51x+15y+50z+173=0 (D) none of these

Image of line (x - 2)/3 = (y - 1)/1 = (z - 1)/(-4) in the plane x + y + z = 7 is

The equation of the parallel plane lying midway between the parallel planes 2x-3y+6z-7=0 and 2x-3y+6z+7=0 is (A) 2x-3y+6z+1=0 (B) 2x-3y+6z-1=0 (C) 2x-3y+6z=0 (D) none of these

The equation of the plane through the intersection of plane x+2y+3z=4 and 2x+y-z-5 and perpendicular to the plane 5x+3y+6z+8=0 is (A) 7x-2y+3z+81=0 (B) 23x+14y-9z+48=0 (C) 51x+15y+50z+173=0 (D) none of these

The angle between the planes 3x-4y+5z=0 and 2x-y-cz=5 is