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A variable circle is drawn to touch the...

A variable circle is drawn to touch the x-axis at the origin. The locus of the pole of the straight line `l x+my+n=0` w.r.t the variable circle has the equation:

A

`x(my-n)-ly^(2)=0`

B

`x(my+n)-ly^(2)=0`

C

`x(my-n)+ly^(2)=0`

D

None of these

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The correct Answer is:
A
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