The pattern is a 5-letter palindrome: 1st=5th and 2nd=4th. Outer letters go A,B,C,DβE. The 2nd/4th letters go Z,Y,X,WβV. The middle letter goes Y,X,W,VβU. So the next term is EVUVE.
Option A:
Option A collapses the middle and inner-pair logic by repeating V in three positions, not matching the observed centre shift.
Option B:
Option B swaps the inner-pair and the middle behaviour (inner becomes U and centre becomes V), which is inconsistent with the series.
Option C:
Option C keeps W in the inner pair instead of moving to V, breaking the step.
Option D:
Option D is correct because it advances the outer letter to E, moves the inner pair to V, and shifts the centre from V to U while preserving the palindrome.
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