Four letter-clusters have been given in the options, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.
Answer & explanation
Correct answer: option 4
THE LOGIC;
1) ORVA,
O → (+3) → R → (+4) → V → (+5) → A
2) EHLQ,
E → (+3) → H → (+4) → L → (+5) → Q
3) ILPU,
I → (+3) → L → (+4) → P → (+5) → U
4) KOSW,
K → (+4) → O → (+4) → S → (+4) → W
Thus, KOSW is the odd one.