Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
WBL, DIS, KPZ, RWG, ?
1
YEM
2
ZDN
3
XDN
4
YDN
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
WBL, DIS, KPZ, RWG, ?