When light is refracted through a prism and the angle of deviation is at its minimum, the following occurs:

The refracted ray inside the prism is parallel to the base of the prism.

The angle of incidence and the angle of emergence are equal.

There are two sets of angles of incidence that result in the same angle of deviation, except when the deviation is at its minimum.

These points are illustrated by the equation:

For the minimum angle of deviation ( ), the condition is met, and the refracted ray becomes parallel to the base. Thus, statements , and D are correct.