DL
DM
GH
LM
Answer is Right!
Answer is Wrong!
The answer is $\boxed{\text{DL}}$.
The sequence is formed by adding 3 to the previous letter.
- A + 3 = B
- B + 3 = C
- C + 3 = D
Therefore, the next letter in the sequence is $\boxed{\text{DL}}$.
Option A is incorrect because $D$ is not the next letter in the sequence.
Option B is incorrect because $DM$ is not the next letter in the sequence.
Option C is incorrect because $GH$ is not the next letter in the sequence.
Option D is correct because $DL$ is the next letter in the sequence.