In the following question, select the odd group of letters from the given alternatives based on the alphabetical step pattern.

Introduction / Context:
This odd man out question from verbal reasoning tests your ability to see hidden patterns in groups of letters. Many aptitude exams use such alphabet based series to check how quickly you can convert letters into positions and notice regular jumps.

Given Data / Assumptions:

• Letter groups: RTVX, GIKM, DFIK, LNPR.
• You must select the one group that does not follow the same alphabetical jump rule as the others.
• Use standard English alphabet positions: A = 1, B = 2, ..., Z = 26.

Concept / Approach:
The main idea is to convert each letter into its numerical position and then check the difference between consecutive letters. If three groups show a constant step, and one group breaks that pattern, that breaking group is the odd one out.

Step-by-Step Solution:
RTVX: R = 18, T = 20, V = 22, X = 24. Jumps are +2, +2, +2. GIKM: G = 7, I = 9, K = 11, M = 13. Jumps are +2, +2, +2. LNPR: L = 12, N = 14, P = 16, R = 18. Jumps are +2, +2, +2. DFIK: D = 4, F = 6, I = 9, K = 11. Jumps are +2, +3, +2, so the pattern is not uniform. Hence DFIK alone does not maintain a constant +2 step throughout the group.

Verification / Alternative check:
You can quickly verify by writing just the differences in each group: RTVX gives 2,2,2; GIKM gives 2,2,2; LNPR gives 2,2,2; DFIK gives 2,3,2. Since only DFIK has a middle jump of 3 instead of 2, this confirms that DFIK breaks the consistent pattern followed by the other three options.

Why Other Options Are Wrong:

• RTVX: All letters are spaced by a fixed +2 step, so it matches the main rule.
• GIKM: Also follows the same +2, +2, +2 jump and cannot be odd.
• LNPR: Again maintains a +2 step throughout, so it belongs to the majority pattern.

Common Pitfalls:
Candidates sometimes look only at the idea of letters being “skipped” and do not calculate the exact step size. Because every group appears to skip letters, DFIK can look normal at a glance. Always convert letters to numbers and check every jump. Ignoring even one difference can cause you to miss the irregular group.

Final Answer:
DFIK