Find the odd one out.

The correct option is SRQ.

To find the odd one out, let us analyze the alphabetical order of the letters in each given option:
1. CDE: The letters C, D, and E are in consecutive forward alphabetical order (C → D → E).
2. KLM: The letters K, L, and M are in consecutive forward alphabetical order (K → L → M).
3. TUV: The letters T, U, and V are in consecutive forward alphabetical order (T → U → V).
4. SRQ: The letters S, R, and Q are in consecutive reverse alphabetical order (S → R → Q, or Q → R → S in forward order).
5. NOP: The letters N, O, and P are in consecutive forward alphabetical order (N → O → P).

Since all other options consist of three consecutive letters in alphabetical order from left to right, while SRQ is written in reverse alphabetical order, SRQ is the odd one out.