Select the letter-cluster that can replace the question mark (?) in the following series.KPD, MNW, QJP, SHI, ?

Select the letter-cluster that can replace the question mark (?) in th

1.	Select the letter-cluster that can replace the question mark (?) in the following series.KPD, MNW, QJP, SHI, ?
A.	UDP
B.	WDP
C.	UDB
D.	WDB
Answer» E.