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For any non-zero real value of "m" ,the ...

For any non-zero real value of "m" ,the equation of the parabola to which the line "`mx-y+10+m^(2)=0`" is a tangent,is (A) "`x^(2)=y-10` (B) "`y^(2)=4(x-2)`(C) "`x^(2)=-4(y-10)` (D) `x^(2)=-4y`

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