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If x+y=k is a normal to the parabola y^(...

If x+y=k is a normal to the parabola `y^(2)=12x` then it touches the parabola

A

`y^(2)=-9 x`

B

`y^(2)=-12 x`

C

`y^(2)=-16 x`

D

`y^(2)=-36 x`

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The correct Answer is:
D
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