A focal chord of parabola y^(2)=4x .is i...

A focal chord of parabola `y^(2)=4x` .is inclined at an angle of `(pi)/(4)` with positive x -direction then the slope of normal drawn at the ends of chord will satisfy the equation
`(A) m^(2)-2m-1=0 (B) m^(2)+2m-1=0
(C) m^(2)-1=0 (D) m^(2)+2m-2=0`

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