Find the Standard Form of the Parabola with the Given $x = 5$

Multiple Choice

Find the standard form of the parabola with the given characteristic and vertex at the origin.
directrix: $x = 5$

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