Find the odd one?

The correct option is EG.

To find the odd one out among the given letter pairs, let us analyze the alphabetical positions of each letter (where A = 1, B = 2, C = 3, ..., Z = 26):

1. GA:
Position of G = 7, Position of A = 1
Difference = 7 - 1 = 6

2. CE:
Position of C = 3, Position of E = 5
Difference = |3 - 5| = 2

3. FG:
Position of F = 6, Position of G = 7
Difference = |6 - 7| = 1

4. DB:
Position of D = 4, Position of B = 2
Difference = 4 - 2 = 2

Alternatively, looking at the positional values of letters in each pair:

• GA: G (7) and A (1) → 7 is odd, 1 is odd (both letters correspond to odd positions).

• CE: C (3) and E (5) → 3 is odd, 5 is odd (both letters correspond to odd positions).

• FG: F (6) and G (7) → 6 is even, 7 is odd (contains an even position).

• DB: D (4) and B (2) → 4 is even, 2 is even (both letters correspond to even positions).

Now, let us examine EG:

• Position of E = 5, Position of G = 7
Here, E and G are consecutive odd numbers (prime/odd letter sequence with step 2: E, F, G skip 1 letter F). Unlike the other pairs, E and G form a forward skip pattern of 2 odd-numbered positions: 5 and 7.

Therefore, EG is the odd pair among the given options.