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If `C_(1),C_(2),C_(3),...` is a sequence of circles such that `C_(n+1)` is the director circle of `C_(n)`. If the radius of `C_(1)` is 'a', then the area bounded by the circles `C_(n)` and `C_(n+1)`, is

A

`2^(n)pi a^(2)`

B

`2^(2n-n) pia^(2)`

C

`2^(n-1)pi a^(2)`

D

none of these

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The correct Answer is:
C
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  17. If theta is the angle between the two radii (one to each circle) drawn...

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  18. The number of rational point(s) [a point (a, b) is called rational, if...

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