These groups are four letter blocks that move through the alphabet while wrapping around past Z. The starting letters Z, Y, X and W move backward one step each time, and the rest of each group continues forward from that starting point. After WXYZ, the next starting letter must therefore be V and the block from V is V, W, X, Y. This yields VWXY, which maintains the backward motion of the first letter and the forward run of four letters, so it is the correct next term.
Option A:
Option A, UVWX, is a valid consecutive block but starts at U, which is two steps before W instead of one. This breaks the one step backward progression of the starting letters from Z to Y to X to W. Because the step size changes, UVWX is not consistent with the pattern.
Option B:
Option B, VWXZ, starts at V but scrambles the last letters so they are no longer four consecutive letters. It omits Y and jumps to Z in a way that does not follow the simple forward run inside each group. Therefore VWXZ does not match the internal structure of the series.
Option C:
Option C is correct because VWXY begins at V and continues with W, X and Y in strict order. It extends the backward starting sequence and keeps the four letter forward motion, exactly as the earlier groups do. This complete agreement with both directions of movement makes VWXY the logical continuation.
Option D:
Option D, XYZB, returns to a group that overlaps heavily with earlier terms and does not follow the backward movement of the starting letter from W to V. It effectively reverses the progress of the series. As a result, XYZB cannot be the next term.
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