A medium is separated from other medium of refractive index ${\mu }_0$ by x-z plane. Refractive index of the medium varies as  $\mu ={\mu }_0-{\mu }_{1}y+{\mu }_2{y}^2$, choose the CORRECT statement(s). A ray is incident from the other medium to this medium ( ${\mu }_0,{\mu }_1\&{\mu }_2$ are positive):-

Ray will definitely return in the medium of refractive index  ${\mu }_0$.

Ray will never return in the medium of refractive index ${\mu }_0$ for any value of  $\theta ,{\mu }_1\&{\mu }_2$

If ray crosses a particular y, then it will never return to medium having refractive index  ${\mu }_0$.

For ray to not return in medium of refractive index  ${\mu }_0,\theta <{\sin }^{-1}[1-\frac{{\mu }_1^2}{4{\mu }_0{\mu }_2}]$