Based on the position in the English alphabetical order, three of the following letter - clusters are alike in some manner and one is different. Select the odd letter-cluster.

XUSO NKHE MJGD WTQN

XUSO

XUSO ⇒ X→(-3)→ U →(-2) → S →(-3)→O (ODD) NKHE ⇒ N→(-3)→K →(-3) → H →(-3)→E MJGD ⇒ M→(-3)→J →(-3) → G →(-3)→D WTQN ⇒ W→(-3)→T →(-3) → Q →(-3)→N