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From four corners of a square sheet of side 4 cm, four pieces each in the shape of arc of a circle with radius 2 cm, are cut out. The area of the remaining portion is:
[A] (4 – 2π) sq. cm.
[B] (16 – 4π) sq. cm.
[C] (8 – π) sq. cm.
[D] (16 – 8π) sq. cm
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