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The equations of the tangents drawn from...

The equations of the tangents drawn from the origin to the circle `x^(2) +y^(2) +2r x +2hy+h^(2) =0`, are `:`

A

`x=0`

B

y= 0

C

`( h^(2) -r^(2)) x - 2r hy =0`

D

`( h^(2) - r^(2)) x+ 2rhy= 0`

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