Four-letter blocks shifting backward – UGC NET Question

Each term is a block of four consecutive letters, but the starting letters move backward by two each time. The starting letters M, K, I and G are at positions 13, 11, 9 and 7, all decreasing by 2. Continuing this pattern, the next starting letter is position 5, which is E, and the four letter block from E is EFGH. Hence EFGH continues both the backward step and the consecutive group structure.

Option A:
Option A, FGHI, starts at F, which is one position after G instead of two positions before it. This contradicts the clear pattern of stepping back by two in the starting letters. Although FGHI is a consecutive group, it does not come from the correct starting point and therefore is not the right answer.

Option B:
Option B is correct because it uses E as the starting letter, exactly two positions before G, and forms the consecutive sequence E, F, G and H. This keeps the block length constant and preserves the minus two jump in the starting positions. It fits the way the previous terms move backward through the alphabet.

Option C:
Option C, DEFG, begins at D, which would represent a step of minus three from G rather than minus two. This changes the size of the backward movement without any indication that the pattern is altering. As the series exhibits a consistent decrement of two, DEFG cannot be accepted.

Option D:
Option D, HIJK, moves forward from G instead of backward and breaks the monotonic decrease in the starting letters. It ignores the structure of moving left through the alphabet and so does not satisfy the series rule.