Which of the following letters will come in place of the question mark to complete the given series in the group?
KUCJ, NRFG, QOID, ?

Select the letter-cluster that can replace the question mark (?) in the following series.
FIY, HLD, JOI, LRN, NUS, ?

Select the combination of letters that when sequentially placed in the gaps of the given letter series will complete the series.
cd_ab_cd_abb_dda_b

Choose the correct alternative from the given ones that will complete the given sequence.
ALN, DNP, GPR, ?

Choose the correct alternative from the given ones that will complete the given sequence.
LXF, MTJ, NPN, OLR, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
EFGHI, LMNO, RST, WX?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
AZ, BY, CX, ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
AB_AB_AA_BB_