Which letter-cluster will replace the question mark (?) to complete the given series?
NDGB, OFJF, ?, TMSQ, XRYX
1
RHNK
2
RINJ
3
QINK
4
QJNK
Which letter-cluster will replace the question mark (?) to complete the given series?
NDGB, OFJF, ?, TMSQ, XRYX