In this alphabet pattern question on letter pairs, select the odd pair from the given alternatives based on constant jumps in the alphabet.

Introduction / Context:
This reasoning question deals with pairs of letters from the English alphabet. You are asked to identify the odd pair that does not follow the same jump pattern between the two letters. Recognizing fixed differences between alphabet positions is a very standard skill tested in series and coding decoding questions in competitive exams.

Given Data / Assumptions:
- The letter pairs are FJ, KO, RV, and WZ.- All letters are uppercase.- We assume that the rule is based on numerical positions of letters in the alphabet.

Concept / Approach:
The usual approach is to convert each letter into its alphabet position and then calculate the difference between the first and second letters in each pair. If three pairs have the same difference and one pair has a different difference, the distinct pair is the odd one out. This method eliminates guesswork and provides a clear numeric pattern.

Step-by-Step Solution:
Step 1: In FJ, F is the 6th letter and J is the 10th letter. The difference is 10 minus 6 which equals 4.Step 2: In KO, K is the 11th letter and O is the 15th letter. The difference is 4 again.Step 3: In RV, R is the 18th letter and V is the 22nd letter. The difference is also 4.Step 4: In WZ, W is the 23rd letter and Z is the 26th letter. The difference here is 3, not 4.Step 5: Thus, three pairs share a constant jump of plus 4, while one pair has a jump of plus 3.

Verification / Alternative check:
Say the alphabet sequence aloud: F, G, H, I, J spans four steps; K, L, M, N, O spans four steps; R, S, T, U, V spans four steps. However, W, X, Y, Z has only three steps from W to Z. This oral check confirms the numeric observation.

Why Other Options Are Wrong:
FJ: F to J represents a forward jump of four letters.KO: K to O is also a forward jump of four letters.RV: R to V maintains the same forward jump of four letters.

Common Pitfalls:
Some candidates only notice that all pairs are ascending and stop there. The crucial point is not just the direction, but also that the exact step size should match, so you must calculate the numerical difference.

Final Answer:
The odd letter pair is WZ because it has a jump of three letters, while the other pairs have a jump of four letters between their letters.