Answer:
Whole-tone, is the right answer.
Step-by-step explanation:
A scale in which every note is sequestered from its acquaintances by the interlude of a unified tone is known as the whole-tone scale. There is no leading tone in the whole-tone scale and thus there is no single tone persists out. This impression is particularly highlighted by the very fact that triads formed on such range tones are all enlarged triads.