Select the letter-cluster from among the given options that can replace the question mark (?) in the following series: MCFI, NEKP…

Question

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series:

MCFI, NEKP, OGPW, PIUD, ?

1. A. NKYD
2. B. QLYL
3. C. QKZK (Correct answer)
4. D. QKZL

Correct Answer

Option C — QKZK

Detailed Solution & Explanation

The correct answer is QKZK.

Key Points

• Column by column: Position 1 M→N→O→P→Q (+1).
• Position 2 C→E→G→I→K (+2).
• Position 3 F→K→P→U→Z (+5).
• Position 4 I→P→W→D→K (+7, wrapping).
• The next cluster is QKZK.
• Four different arithmetic steps run in parallel here; isolating each column is the only reliable method, and the +7 wrapping column is the discriminator between the near-identical options.