Select the letter cluster that will replace the question mark (?) in the following series. NQST , PSUV , RUWX , ?

RTUV TWYZ VWXY TVXY

TWYZ

Every alphabet is increasing by +2 N → +2 → P → +2 → R → +2 → T Q→ +2 → S → +2 →U → +2 → W S → +2 → U → +2 →W → +2 →Y T→ +2 → V → +2  → X→ +2 → Z