Three letter groups sliding backward – UGC NET Question

Every term is a block of three consecutive letters, and the starting letter moves backward by one each time: K, J, I, H → G. Hence GHI.

Option A:
Option A is correct because it continues the −1 slide to G and keeps the 3-letter consecutive block.

Option B:
Option B repeats a previous middle term (breaks the slide).

Option C:
Option C moves forward and breaks the backward slide.

Option D:
Option D jumps the starting letter too far back (−3), not −1.