Correct option is B
In the given triads, each letter increases by a fixed number in alphabetical order. LO (12,15) → JR (10,18) → MP (13,16) MP (13,16) → KS (11,19) → NQ (14,17) Pattern: Forward and backward shifts in fixed steps. Only option (b) maintains a similar progression pattern in all three elements of the triad.
Explanation of options: (a) ✘ QT–OW–RV breaks the alphabetical spacing found in the question triads. The jump in letters is inconsistent. (b) ✔ PS–NV–QT maintains the same forward-backward combination seen in the original triads. It follows both position and alphabetical logic. (c) ✘ OR–MU–PT shows irregular spacing and mismatches the structure of the given triads. (d) ✘ NQ–LT–OS does not hold the same alphabetical transitions in both first and second elements of the triad.