Which letter-cluster will replace the question mark (?) to complete the given series?
 TBNF, CJUL, LRBR, UZIX, ?

Select the letter that will replace the question mark (?) in the given letter series.
 a, d, h, n, ?

Which letter cluster will replace the question mark (?) to complete the given series?
 ETRE, AZJG, WFBI, SLTK, ?

Select the c ombination of letters that when sequentially placed in the blanks of the given series will complete the series.
 _ c _ d d _ c a _ c b d d b _ a

Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
 A B Z _ P A B _ K P A B X K _ A B _ K P

Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?
 WDV, TGS, QJP, NMM, ?

Which letter-cluster will replace the question mark (?) to complete the given series?
 ERKV, HYVK, ?, NMRO, QTCD

Which letter-cluster will replace the question mark (?) to complete the given series?
 ZFOE, PYUA, FRAW, VKES, ?