Arc BCD is known as:
major arc
minor arc
both halves are equal so it may be major or minor arc
none of these
The part of the circle between BCD is the arc which is of lesser length compared to the arc of length BAD, so BCD is the minor arc of the circle.
The shaded region consists of a chord and the arcs of the circle. The region in the yellow has the major arc so it is the major segment and the purple region consists of the minor arc so it is the minor segment.