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A circular piece of metal of maximum are...

A circular piece of metal of maximum area is cut out from a square piece and then a square piece of maximum area is cut out of the circular piece. The total area of wasted metal is

A

`1/4` of the area of original square

B

`1/2` of the area of original square

C

`1/2` of the area of the circular piece

D

`1/4` of the area of the circular piece

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