Four letter-clusters are given, three of them are alike in certain manner and one is different. Choose the different letter-cluster.

1st and 2nd alphabet are consecutive alphabets in the English alphabetical series. 3rd and 4th alphabet are consecutive alphabets in the English alphabetical series. 3rd alphabet is 3rd succeeding alphabet of the 2nd alphabet. In option (a): DEHI → (D and E are consecutive alphabets), (H and I are consecutive alphabets). (E + 3) = H. In option (b): BCFG → (B and C are consecutive alphabets), (F and G are consecutive alphabets). (C + 3) = F In option (c): RSVW → (R and S are consecutive alphabets), (V and W are consecutive alphabets). (S + 3) = V In option (d): WXBA → (W and X are consecutive alphabets), (A and B are consecutive alphabets). (X + 3) = A