Which of the following is NOT a type of scale in Western music?

In Western music, the major, chromatic, and whole tone scales are all well-defined types of scales used to create melodies and harmonies.

The major scale, which consists of seven distinct pitches in a specific pattern of whole and half steps, is foundational to Western tonality. The chromatic scale, made up of twelve pitches that include all semitone intervals, allows for greater expressive possibilities in music. The whole tone scale consists of six pitches, each a whole step apart, creating a unique sound that steers clear of traditional tonal centers.

The term "quadrant," however, does not refer to a recognized scale in Western music theory. Therefore, identifying "quadrant" highlights that it does not hold the same status as the other established scales, reinforcing the importance of distinct musical terminology in understanding Western music practices.