Explanation:

Let’s break it down:

- CCdee: C is doubled, then d and e come right after in the alphabet.

- EEfgg: E is doubled, then f and g appear in sequence (f right after E, then g).

- TTuvv: T is doubled, then u and v follow (u and v come after T in alphabetical order).

- KKlmn: K is doubled, but after that, you get l, m, n—which is three consecutive letters after K, not just two.

So here’s the thing: The first three options all double a letter and then give the next two consecutive letters. Only option 4 (KKlmn) gives you the next three letters, and that breaks the pattern.

The odd one out is: Option 4 — KKlmn