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In the adjoining figure a quadrant ( of ...

In the adjoining figure a quadrant ( of circle ) inscribes a square of maximum possible area . If the radius of the circle be 'r' then what is the area of the square ?

A

`(r^(2))/(2) `

B

`(3r^(2))/(5) `

C

`(r^(2))/(sqrt(3))`

D

`2 sqrt(6) r`

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The correct Answer is:
A
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