The length of the major axis of the ellipse $\large\frac{x^2}{a^2}+\frac{y^2}{b^2}$$=1$ is 2 times the length of minor axis its eccentricity is :

Question

$\begin{array}{1 1}(a)\;\large\frac{\sqrt 2}{3}\\(b)\;\large\frac{\sqrt 3}{2}\\(c)\;\large\frac{\sqrt 5}{3}\\(d)\;\text{None of these}\end{array}$