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Length and breadth of a rectangular sheet of paper are 20 cm and 10 cm, respectively. A rectangular piece is cut from the sheet as shown in Fig. Which of the following statements is correct for the remaining sheet? 

A)  Perimeter remains same but area changes.

B)  Area remains the same but perimeter changes.

C)  Both area and perimeter are changing.

D)  Both area and perimeter remain the same.