The Critical Angle for Total Internal Reflection at a Diamond-Air $\degree$

The critical angle for total internal reflection at a diamond-air interface is 25 $\degree$ . Suppose light is incident at an angle of $\theta$ with the normal. Total internal reflection will occur if the incident medium is:

A) air and $\theta$ = 25 $\degree$
B) air and $\theta$ > 25 $\degree$
C) air and $\theta$ < 25 $\degree$
D) diamond and $\theta$ < 25 $\degree$
E) diamond and $\theta$ > 25 $\degree$