Let a. b. and λ be positive real numbers. Suppose P is an endpoint of the latus rectum of the parabola y² = 4λx and suppose the ellipse x²/a² + y²/b² = 1 passes through the point P. If the tangents to the parabola and the ellipse at the point Pare perpendicular to each other, then the eccentricity of the ellipse is
(A) 1/√2
(B) 1/2
(C) 1/3
(D) 2/5