Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the odd letter-cluster.
Answer & explanation
Correct answer: option 1
OPTU = O → (+1) → P → (+4) → T → (+1) → U (THIS IS ODD)
LMST = L → (+1) → M → (+6) → S → (+1) → T
CDJK = C → (+1) → D → (+6) → J → (+1) → K
ABHI = A → (+1) → B → (+6) → H → (+1) → I