The area of the shaded region in the given figure, where arcs are drawn with centres \( P, Q, R ...

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The area of the shaded region in the given figure, where arcs are drawn with centres \( P, Q, R \) and \( S \) intersect in pairs at mid-points \( \mathrm{A}, \mathrm{B}, \mathrm{C} \) and \( \mathrm{D} \) of the sides \( \mathrm{PQ}, \mathrm{QR}, \mathrm{RS} \) and \( \mathrm{SP} \), respectively of a square PQRS, is
a. \( 25.25 \mathrm{~cm}^{2} \)
b. \( 18.25 \mathrm{~cm}^{2} \)
c. \( 29.65 \mathrm{~cm}^{2} \)
d. \( 30.96 \mathrm{~cm}^{2} \)
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