Which letter group from the choices below will logically fill the blank (?) to complete the sequence?

KPR, LSO, MVL, ?

The correct option is NXI.

To find the missing letter group in the sequence, let us analyze the pattern followed by each letter position across the terms:

1. First letter of each group:
K → L → M → ?
The first letters follow consecutive alphabetical order:
K (+1) → L (+1) → M (+1) → N

2. Second letter of each group:
P → S → V → ?
The second letters move forward by 3 steps in the alphabet:
P (+3) → S (+3) → V (+3) → X

3. Third letter of each group:
R → O → L → ?
The third letters move backward by 3 steps in the alphabet:
R (-3) → O (-3) → L (-3) → I

Combining the resulting letters from each position gives NXI.