`{:(A,B,C,D,E,F,G,H,I,J,K,L,M),(1,2,3,4,5,6,7,8,9,10,11,12,13),(N,O,P,Q,R,S,T,U,V,W,X,Y,Z),(14,15,16,17,18,19,20,21,22,23,24,25,26):}`
In each of the following questions, four groups of letters are given, three of them are alike in a certain way while one is different. Choose the odd one.

Options

A. XGEZ
B. PCAQ
C. LKIN
D. DWUF

Answer

To solve the problem of identifying the odd one out among the four groups of letters, we will analyze each group based on the pattern of letter progression.

### Step-by-Step Solution:

1. **Analyze the first group: X, G, E, Z**
- From X to Z:
- X (24) to Z (26) → 2 steps forward.
- From G to E:
- G (7) to E (5) → 2 steps backward.
- Pattern: +2, -2.

2. **Analyze the second group: P, C, A, Q**
- From P to Q:
- P (16) to Q (17) → 1 step forward.
- From C to A:
- C (3) to A (1) → 2 steps backward.
- Pattern: +1, -2.

3. **Analyze the third group: L, K, I, N**
- From L to N:
- L (12) to N (14) → 2 steps forward.
- From K to I:
- K (11) to I (9) → 2 steps backward.
- Pattern: +2, -2.

4. **Analyze the fourth group: D, W, U, F**
- From D to F:
- D (4) to F (6) → 2 steps forward.
- From W to U:
- W (23) to U (21) → 2 steps backward.
- Pattern: +2, -2.

### Conclusion:
- The first, third, and fourth groups follow the same pattern of +2 for the first pair and -2 for the second pair.
- The second group (P, C, A, Q) has a different pattern of +1 for the first pair and -2 for the second pair.
- Therefore, the odd one out is **option 2: P, C, A, Q**.