Alphabet series – complete the three-letter pattern Sequence: PMT, OOS, NQR, MSQ, ?

Introduction / Context:
In three-letter series questions, each position (first, second, third letter) often follows its own rule. Solving requires tracking three mini-sequences in parallel and then combining the results to form the missing term.

Given Data / Assumptions:

• Terms: PMT, OOS, NQR, MSQ, ?
• English alphabet positions: A=1 to Z=26.
• Only one valid continuation is intended.

Concept / Approach:
Split each term into its three columns and inspect the movement in each column separately. Look for simple patterns like +1, −1, +2, or constant steps.

Step-by-Step Solution:

Verification / Alternative check:
Confirm the uniform steps: first column −1, second column +2, third column −1 throughout. All transitions fit, and LUP continues them consistently.

Why Other Options Are Wrong:

• LVP or LWP: the middle letter V or W would imply +4 or +6 in the second column, breaking the +2 pattern.
• LVR: ends with R, but the third column should go Q→P (−1), not Q→R (+1).
• MUP: would break the first column's −1 step (M should have already been used).

Common Pitfalls:
Treating each three-letter block holistically rather than column-wise; missing that each position evolves independently.

Final Answer:
LUP