Five letter evenly spaced staircase groups – UGC NET Question

Every group contains five letters, each separated by two positions from the next. From one group to the next, each letter shifts forward by one place: ACEGI becomes BDFHJ, then CEGIK, then DFHJL. Applying this shift again, D, F, H, J and L become E, G, I, K and M respectively. Hence EGIKM is the only group that continues the pattern.

Option A:
Option A, EGJLN, distorts the equal spacing and is not formed by adding one to each letter in DFHJL. Therefore it does not respect the structural rule.

Option B:
Option B, EGIJL, breaks the regular spacing and is not obtained by a consistent +1 transformation of DFHJL.

Option C:
Option C is correct because it advances each letter of DFHJL by exactly one position while preserving the +2 spacing inside the group.

Option D:
Option D, FGIKM, starts with F instead of E, so it does not match the +1 shift from DFHJL.