Normals are drawn from a point P with slopes m₁,m₂ and m₃ are drawn from the point p not from the parabola y²=4x. For m₁m₂=α, if the locus of the point P is a part of the parabola itself, then the value of α is
(a) 1
(b)-2
(c) 2
(d) -1