A Glass Plate with an Index of Refraction Is 1

Multiple Choice

A glass plate with an index of refraction is 1.57 is immersed in an oil having a refractive index of 1.40.The surface of the glass is inclined at an angle of 54° with the vertical.A horizontal light ray in the glass strikes the interface.What is the angle that the refracted ray,in the oil,makes with the horizontal?

A) 11°
B) 5.6°
C) 8.3°
D) 14°
E) 17°