In the standard ellipse, the lines joining the ends of the minor axis to one focus are at right angles. The distance between the focus and the nearer vertex is `sqrt(10) - sqrt(5)`. The equation of the ellipse
A. `(x^(2))/(36) +(y^(2))/(18) = 1`
B. `(x^(2))/(40)+(y^(2))/(20) = 1`
C. `(x^(2))/(20) +(y^(2))/(10) = 1`
D. `(x^(2))/(10)+(y^(2))/(5) =1`