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If a tangent to the ellipse x^2 + 4y^2 ...

If a tangent to the ellipse ` x^2 + 4y^2 = 4` meets the tangents at the extremities of its major axis at B and C, then the circle with BC as diameter passes through the point :

A

` ( sqrt(3),0)`

B

` ( sqrt(2) ,0)`

C

` (1,1)`

D

` (-1,1)`

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