Four letter series with equal jumps – UGC NET Question

In this series each term is a four letter group where the distance between consecutive letters inside a group is fixed. From BGLQ to CHMR to DINS to EJOT, every letter in each position moves forward by one step in the alphabet, so the vertical columns form simple increasing sequences. Applying the same shift to EJOT, E goes to F, J goes to K, O goes to P and T goes to U, giving FKPU. No other option arises from this consistent column wise movement with the same internal spacing, so FKPU is the correct continuation.

Option A:
Option A maintains the internal structure of the earlier groups because the gaps between F, K, P and U match those seen in BGLQ, CHMR, DINS and EJOT. It also continues each column sequence smoothly, for example the first letters B, C, D and E are followed naturally by F. Since it respects both the within group spacing and the across group progression, FKPU fits perfectly into the series.

Option B:
Option B, GLQV, looks similar but pushes every letter two steps ahead of EJOT instead of one, which breaks the steady one step advancement seen earlier. As a result, its letters no longer align with the vertical sequences formed by the previous groups. Because it distorts the regular shift pattern, GLQV cannot be the correct next term.

Option C:
Option C, FJPV, changes the differences between letters inside the group so that they do not match the constant spacing of the given series. It also mixes letters that do not arise from shifting EJOT uniformly forward. This double mismatch in spacing and transformation makes FJPV an invalid continuation.

Option D:
Option D, EJPU, keeps the first two letters unchanged and alters only the last two, whereas the pattern clearly moves all four letters together. Its internal distances differ from those of the original terms as well. Therefore EJPU does not satisfy the rule governing the series.