What is the common name of benzene$-1,3-$diol?

Consider the following statements $A$ and $B$. Identify the correct choice in the given answers.
$A$. The refractive index of the extra-ordinary ray depends on the angle of incidence in double refraction.
$B$. The vibrations of light waves acquire one-sidedness for both ordinary and extraordinary rays in double refraction.

Select the correct statement $:-$

The equations of the normals at the ends of the latus rectum of the parabola $y^2 = 4ax$ are given by

The eccentricity of the conic $36x^2 + 144y^2 - 36x - 96y - 119 = 0$ is

If $\tan x + \tan \left(x + \frac{\pi}{3}\right) + \tan \left(x + \frac{2\pi}{3}\right) = 3$,then $\tan 3x$ is equal to