Four letter-cluster pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.
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Correct answer: (B) CABALETTA: ABZBJFRUY
Explanation
In the other three pairs the letters change alternately by +2 and −1 (e.g. I→K, N→M). In CABALETTA the pattern is −2, +1 (C→A, A→B), so it is different.