Question

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series. CDE, FGH, IJK, ?

• A. OJB
• B. TYC
• C. LJN
• D. LMN

Answer 1

Answer:

D. LMN

Observe the pattern:

• CDE

• FGH

• IJK

• ?

Each cluster consists of 3 consecutive letters, and the starting letter advances by 3 positions:

• C → F → I → L

So the next cluster is:

$\boxed{\text{LMN}}$

Answer: LMN.