Four-letter forward sliding block series – UGC NET Question

The terms are four letter consecutive blocks arranged in a sliding window. The starting letters B, C, D and E move forward by one position in each step, and every block contains the next three letters after the starting one. After EFGH, the next starting letter is F, and the block from F is FGHI. This group therefore continues both the sliding and the consecutive pattern.

Option A:
Option A, GHIJ, begins at G and thus skips the block starting with F that should immediately follow EFGH. While GHIJ is a valid consecutive block, it represents a later step in the sliding sequence. As the question asks for the next term, not a later one, GHIJ is not correct.

Option B:
Option B, EFGH, repeats the last given term without moving the starting letter forward. The sequence clearly advances the starting letter by one in each new group. Using EFGH again would freeze that movement, so it does not fit the pattern.

Option C:
Option C, HIJK, starts too far ahead and does not match the one step progression of the starting letter. It is consistent with the idea of consecutive letters, but not with the specific sliding rule observed. Therefore HIJK cannot be the immediate next term.

Option D:
Option D is correct because FGHI begins exactly one letter after E and continues with three consecutive letters. It preserves the group length and the simple sliding behaviour that characterises the series. For these reasons, FGHI is the appropriate continuation.