If the two tangents drawn from a point P to the parabola ` y^(2) = 4x ` are at right angles then the locus of P is

If two tangents drawn from a point P to the parabola y^2 = 4x are at right angles, then the locus of P is

If two tangents drawn from a point P to the parabola y^(2)=4x are at right angles then the locus of P is

If two tangents drawn from a point p to the parabola y^(2)=4x are at right angles then the locus of p is

If two tangents drawn from a point P to the parabola y2 = 4x are at right angles, then the locus of P is

If two tangents drawn from a point P to the parabola y^2 = 4x are at right angles, then the locus of P is (1) 2x""+""1""=""0 (2) x""=""-1 (3) 2x""-""1""=""0 (4) x""=""1