A ray of light traveling in impure water is incident on a glass plate immersed in it. When the angle of incidence is 51, the reflected ray is totally plane polarized. Given that refractive index of impure water is 1.4. The refractive index of glass should be ____.(tan 51 = 1.235)
(A) 1.64
(B) 1.34
(C) 1.53
(D) 1.73
