Write an Equation for the Parabola with Vertex at the Origin

Multiple Choice

Write an equation for the parabola with vertex at the origin.
-Focus (5, 0)

A) $x ^ { 2 } = 5 y$
B) $x ^ { 2 } = 20 y$
C) $y ^ { 2 } = 20 x$
D) $y ^ { 2 } = 5 x$