Question

The eccentricity of an ellipse, with its centre at the origin, is $\frac{1}{2}$. If one of the directrices is x = 4 , then the equation of the ellipse is:
(a) 4x² + 3y² = 1
(b) 3x² + 4y² = 12
(c) 4x² + 3y² = 12
(d) 3x² + 4y² = 1

Answer 1

I got an answer but it is not in this options