Select the letter-pair that can replace the question mark (?) in the following series.RD, XJ, DP, JV, ?

Select the letter-pair that can replace the question mark (?) in the f

1.	Select the letter-pair that can replace the question mark (?) in the following series.RD, XJ, DP, JV, ?
A.	PC
B.	QB
C.	QC
D.	PB
Answer» E.