The equation of the normal to the parabola, $x ^ { 2 } = 8 y$ at $x = 4$ is (1) $x + 2 y = 0$ (2) $x + y = 2$ (3) $x - 2 y = 0$ (4) $x + y = 6$
The equation of the normal to the parabola, $x ^ { 2 } = 8 y$ at $x = 4$ is\\
(1) $x + 2 y = 0$\\
(2) $x + y = 2$\\
(3) $x - 2 y = 0$\\
(4) $x + y = 6$