JEE Advanced 2023 Physics question on Wave Optics

A monochromatic light wave is incident normally on a glass slab of thickness $d$, as shown in the figure. The refractive index of the slab increases linearly from $n_1$ to $n_2$ over the height $h$. Which of the following statement(s) is(are) true about the light wave emerging out of the slab?

1. A.
   It will deflect up by an angle $\tan^{-1}\left[\dfrac{(n_2^2 - n_1^2)d}{2h}\right]$.
2. B.
   It will deflect up by an angle $\tan^{-1}\left[\dfrac{(n_2 - n_1)d}{h}\right]$.
3. C.
   It will not deflect.
4. D.
   The deflection angle depends only on $(n_2 - n_1)$ and not on the individual values of $n_1$ and $n_2$.

[JEE Advanced 2023 · Paper 2]