A normal to the curves x^2+kx-y+2=0 at t...

A normal to the curves `x^2+kx-y+2=0` at the point `P` whose abscissa is 1 is parallel to the line, `y=x`. Now answer the question. The value of `k` is equal to
(A) `-3` (B) `1` (C) `0` (D) `2`

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