A Glass Plate Having an Index of Refraction Is 1

Multiple Choice

A glass plate having an index of refraction is 1.66 is immersed in a certain alcohol.The surface of the glass is inclined at an angle of 44° with the vertical.When a horizontal ray in the glass strikes the interface,you observe that it is at the critical angle.What is the index of refraction of the alcohol?

A) 1.15
B) 1.13
C) 1.11
D) 1.09
E) 1.17