The cross section of the cube do not form option (C) octagon is the correct answer.
What is a cube?
A Cube is a solid three-dimensional figure, which has 6 congruent square faces, 8 vertices and 12 edges. A cube is sometimes also referred to as a regular hexahedron or as a square prism.
For the given situation,
Cross sections of a cube,
When a plane intersects a cube there is a variety of shapes of the resulting cross section.
If three adjacent faces of the cube are intersected, the cross section is a triangle.
If two pairs of opposite faces are intersected, the cross section is a square.
If the plane meets all faces of the cube, the cross section is a hexagon.
Hence we can conclude that the cross section of the cube do not form option (C) octagon is the correct answer.
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