The equation of the pair of lines throug...

The equation of the pair of lines through (1,-1) and perpendicular to the pair of lines `x^(2)-x y-2 y^(2)=0` is

A

`2x^2-xy+y^2+5x+y+2=0`

B

`x^2-xy-2y^2-5x-y-2=0`

C

`2x^2-xy-y^2+5x+y-2=0`

D

`2x^2-xy-y^2+5x+y-2=0`

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The correct Answer is:

B

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