If the tangent drawn at point (t²,2t) on the parabola y²=4x, is same as the normal drawn at point (√5cosθ,2sinθ) on the ellipse 4x²+5y²=20 ,then:

A. t =- 2/√5
B. θ = cos−¹(−1√5)
C. t= ±1/√5
D. θ= cos−¹(1/√5)