An unpolarized light beam travelling in air is incident on a medium of refractive index 1.73 at Brewster's angle. Then-

reflected light is completely polarized and the angle of reflection is close to $\displaystyle 60$°

reflected light is partially polarized and the angle of reflection is close to $\displaystyle 30$°

both reflected and transmitted light are perfectly polarized with angles of reflection and refraction close to $\displaystyle 60^{\circ}$ and $\displaystyle 30^{\circ}$, respectively.

transmitted light is completely polarized with angle of refraction close to $\displaystyle 30$°