Which letter-cluster will replace the question mark (?) to complete the given series?
DTXO, FSVN, JRRM, ?, XPDK
1
PQLL
2
POLK
3
QPKL
4
QLPK
Which letter-cluster will replace the question mark (?) to complete the given series?
DTXO, FSVN, JRRM, ?, XPDK