A dodecahedron must have 12 faces
Of these 12 faces, two must be the top & base.
So there shall be 10 faces on the lateral surface.
Hence there shall be 5 on one half & 5 on the other half.
To have 5 faces on the base of a regular polygon, the base must have 5 sides.
So it must be a regular pentagon.
The faces of a regular dodecahedron are regular pentagons.
Option C) is the right answer.
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