What is the order of a rotational symmetry of a square?

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answer is D.

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Detailed Solution

Concept- Rotational symmetry is when an object is rotated on its own axis where the shape of the object looks the same.
As we know, the order of rotational symmetry of a square is how many times square fits onto itself when there is full rotation of 360 degrees whereas square coincides with original twice in one complete turn. So, for two fold rotational symmetry is of order two.
Similarly, we can say that for four fold in square we get rotational symmetry of order 4.
Hence, the correct answer is 4.

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