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

  • A.SXZ
  • B.BGI
  • C.HNP
  • D.TYA

Answer: C

HNP is the odd one. In each of SXZ, BGI and TYA the gap between the first two letters is 5 and between the last two is 2 (S to X is 5, X to Z is 2; B to G is 5, G to I is 2; T to Y is 5, Y to A is 2). In HNP the gaps are 6 (H to N) and 2 (N to P). So HNP breaks the pattern. In each of the other three clusters the letters follow the same shape: every letter is moved forward by the same two steps, 5 and then 2, so the cluster is built from one rule. HNP is the only cluster whose first step is 6, which is why it does not belong.

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