In this letter sequence reasoning question, select the odd group of letters from the following options based on the pattern in the alphabetical positions.

Introduction / Context:
This is a typical letter series odd one out question from logical reasoning. Each option is a group of three letters, and you must find which group does not follow the same alphabetic pattern as the others. These questions test your familiarity with alphabetical positions and your ability to see consistent steps between letters in a group.

Given Data / Assumptions:
- The letter groups are DFH, KMO, QTW, and SUW.- All letters are from the English alphabet.- The pattern is most likely based on positions and gaps between consecutive letters.

Concept / Approach:
The standard technique is to convert each letter into its alphabet position and then examine the differences between successive letters. When three groups show the same difference and one group shows a different difference, that different group is the odd one out. This approach is systematic and avoids guesswork purely based on appearance.

Step-by-Step Solution:
Step 1: For DFH, D is 4, F is 6, H is 8. Differences are +2 and +2.Step 2: For KMO, K is 11, M is 13, O is 15. Differences are again +2 and +2.Step 3: For QTW, Q is 17, T is 20, W is 23. Here, the differences are +3 and +3.Step 4: For SUW, S is 19, U is 21, W is 23. Differences are +2 and +2.Step 5: Three groups have a constant step of 2 between letters, but one group has a constant step of 3.

Verification / Alternative check:
Rechecking quickly, you can see that DFH, KMO, and SUW are of the form x, x+2, x+4, while QTW is of the form x, x+3, x+6. This confirms that QTW does not match the pattern followed by the other three groups.

Why Other Options Are Wrong:
DFH: Clearly follows a +2, +2 pattern.KMO: Also follows a +2, +2 pattern in letter positions.SUW: Again shows the same incremental pattern of +2 and +2.

Common Pitfalls:
Some students look only at the shapes of letters or try to see vowels and consonants instead of calculating positions. The safest method is always to convert letters to numbers and use arithmetic differences to find the pattern.

Final Answer:
The odd letter group is QTW because it uses a step of 3 between letters instead of a step of 2.