In the figure, a ladder of mass $m$ is shown leaning against a wall. It is in static equilibrium making an angle $\theta$ with the horizontal floor. The coefficient of friction between the wall and the ladder is $\mu_1$ and that between the floor and the ladder is $\mu_2$. The normal reaction of the wall on the ladder is $\mathrm{N}_1$ and that of the floor is $\mathrm{N}_2$. If the ladder is about to slip, then
Select ALL correct options:
A
$\mu_1=0 \mu_2 \neq 0$ and तथा $\mathrm{N}_2 \tan \theta=\frac{\mathrm{mg}}{2}$
B
$\mu_1 \neq 0 \mu_2=0$ and तथा $N_1 \tan \theta=\frac{m g}{2}$
C
$\mu_1 \neq 0 \mu_2 \neq 0$ and तथा $\mathrm{N}_2 \tan \theta=\frac{\mathrm{mg}}{1+\mu_1 \mu_2}$
D
$\mu_1=0 \mu_2 \neq 0$ and तथा $N_1 \tan \theta=\frac{m g}{2}$
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