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If tangents PQ and PR are drawn from a p...

If tangents PQ and PR are drawn from a point on the circle `x^(2)+y^(2)=25` to the ellipse `x^(2)/16+y^(2)/b^(2)=1`, (blt4), so that the fourth vertex S of a parellelogram PQRS lies eccentricity of the ellipse is

A

`2(pi)/(3)`

B

`(pi)/(4)`

C

`(pi)/(3)`

D

`(pi)/(2)`

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The correct Answer is:
D
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