Find the odd group of letters from the following alternatives based on the pattern of forward and backward steps in the alphabet.

Introduction / Context:
This question checks your ability to detect how letters move forward and backward in the alphabet within a three letter group. Three groups follow the same combination of backward and forward steps, while one group follows a different pattern and becomes the odd one.

Given Data / Assumptions:

• Letter groups: OMQ, TPR, TRV, VTX.
• We use alphabet positions A = 1, B = 2, ..., Z = 26.
• We focus on the movement from first to second and from second to third letter.

Concept / Approach:
We convert letters to their numeric positions and compute the difference between first and second letters, and between second and third letters. If three groups follow the same two step pattern such as -2 then +4, and one group uses a different combination like -4 then +2, the different combination marks the odd group.

Step-by-Step Solution:
OMQ: O = 15, M = 13, Q = 17. Differences are 13 - 15 = -2 and 17 - 13 = +4. TRV: T = 20, R = 18, V = 22. Differences are -2 and +4 again. VTX: V = 22, T = 20, X = 24. Differences are -2 and +4. TPR: T = 20, P = 16, R = 18. Differences are 16 - 20 = -4 and 18 - 16 = +2. Thus three groups share the pattern first to second = -2 and second to third = +4, while TPR has -4 then +2.

Verification / Alternative check:
Another way to see this is to count letters. From O to M you go back two letters, then forward four to Q. From T to R and V, and from V to T and X, the moves are the same. In TPR, you go back four letters from T to P, then only forward two from P to R, which is obviously a different combination from the other groups.

Why Other Options Are Wrong:

• OMQ: Follows the -2, +4 step pattern and matches TRV and VTX.
• TRV: Also follows -2, +4, so it clearly belongs to the main group.
• VTX: Again shows the same -2, +4 pattern and is not odd.

Common Pitfalls:
Some candidates quickly glance at the letters and assume the patterns are random. Without converting to numbers and checking the exact steps, it is easy to miss subtle differences. Being systematic with alphabet series is crucial: always compute both jumps rather than just noticing that letters move up or down in some way.

Final Answer:
TPR