Find the equation of parabola whose focus (-4,0) & vertex (0,0)?

Question

$\begin{array}{1 1}(a)\;y_1^2=-15x_1\\(b)\;y_1^2=-16x_1\\(c)\;y_1=-15x_1^2\\(d)\;y_1^3=-15x_1^2\end{array}$