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Two circles are drawn inside a big circl...

Two circles are drawn inside a big circle with diameter `frac(2)(3)rd` and `frac(1)(3)`rd of the diameter of the bigger circle. The area of shaded portion, if length of diameter of the circle is 21 cm, is

A

`190 cm^2`

B

`196 cm^2`

C

`154 cm^2`

D

`206 cm^2`

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