Find the equation for the ellipse that satisfies the given conditions : b = 3, c = 4, centre at the origin; foci on the x axis

Question

$\begin {array} {1 1} (A)\;\large\frac{x^2}{25}+\large\frac{y^2}{16}=1 & \quad (B)\;\large\frac{x^2}{16}+\large\frac{y^2}{25}=1 \\ (C)\;\large\frac{x^2}{25}-\large\frac{y^2}{16}=1 & \quad (D)\;\large\frac{x^2}{16}-\large\frac{y^2}{25}=1 \end {array}$