N/A

Note that (x, y) = (r cos θ, r sin θ) = (r cos(−5π/6), r sin(−5π/6)) = $\left(-\dfrac{r\sqrt3}2, -\dfrac{r}2\right)$ is on the graph of $\theta = -\dfrac{5\pi}6$.

Let t = -r/2 and we have $(x(t), y(t)) = (t\sqrt 3, t)$.

Which straight line has this parametric equation?

Edit: I realized that the answer is not in the options.