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 $( 1,0 )$

A) $y ^ { 2 } = 1 x$
B) $y ^ { 2 } = 4 x$
C) $x ^ { 2 } = 1 y$
D) $x ^ { 2 } = 4 y$