Select the letter cluster that will replace the question mark (?) in the following series. CLGTS, DMHUT, ENIVU, ?, GPKXW

FOKXW FOJWV FNJWV FNKXW

FOJWV

Given, CLGTS, DMHUT, ENIVU, ?, GPKXW Every letter cluster is increased by +1, to its previous cluster. So, FOJWV E + 1 = F N + 1 = O I + 1 = J V + 1 = W U + 1 = V