Four letter-clusters have been given, out of which three are alike in some manner, while one is different. Select the odd letter cluster.

SVY XAD FIK NQT

FIK

THE LOGIC; 1) SVY, S → (+3) → V → (+3) → Y 2) XAD, X → (+3) → A → (+3) → D 3) FIK, F → (+3) → I → (+2) → K 4) NQT, N → (+3)  → Q → (+3) → T Thus, FIK is the odd one.