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Two circles are externally tangent. Line...

Two circles are externally tangent. Lines PAB and PA'B' are common tangents with A and A' on the smaller circle and B' and B' on the larger circle. If `PA = AB = 4`, then area of the smaller circle, is

A

`1.44 pi`

B

`2pi`

C

`2.56pi`

D

`pisqrt(8)`

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The correct Answer is:
B
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