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