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If the tangent to the curve, y = x^(3) +...

If the tangent to the curve, `y = x^(3) + ax -b ` at the point `(1, -5)` is perpendicular to the line, `-x +y + 4 =0`, then which one of the following points lies on the curve ? (A) `(-2, 2)` (B) `(2, -2)` (C) `(-2, 1)` (D) `(2, -1)`

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