Four letter-clusters are given, three of them are alike

Solution

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