Which letter-cluster will replace the question mark (?) to complete the given series? ZVRN, VSPM, RPNL, ?, JJJJ
RMLN
RNLL
RNLK
NMLK
Correct answer: NMLK
Solution
Each position in the cluster follows a consistent backward shift. Applying the same positional pattern to the missing term gives NMLK. This also leads naturally to the final term JJJJ.