If the line $y=m x+7 \sqrt{3}$ is normal to the
hyperbola $\frac{x^{2}}{24}-\frac{y^{2}}{18}=1$, then a value of $m$ is
$\frac{\sqrt{5}}{2}$
$\frac{3}{\sqrt{5}}$
$\frac{2}{\sqrt{5}}$
$\frac{\sqrt{15}}{2}$
Correct Option: , 3
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