The correct answer is option D which is square is the polygon will always have 4-fold reflectional symmetry and order 4 rotational symmetry.
Square is defined as the polygon having all four sides equal to each other the angles of all the sides are also equal and the sum of the angles will be 360 degrees.
When the square is folded then it has 4-fold reflectional symmetry and order 4 rotational symmetry.
Therefore the correct answer is option D which is square is the polygon will always have 4-fold reflectional symmetry and order 4 rotational symmetry.
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