The ellipse having its foci (0, ± 1) and major axis of length \(\sqrt{5}\) is

1
20 x2 + 4 y2 = 5
2
36 x2 + 20 y2​ = 45
3
4 x2 + 20 y2​ = 5
4
20 x2 + 36 y2​ = 45

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