Select the letter-cluster that can replace the question mark (?) in the following series.BDF, DHL, FLR, ?

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.BDF, DHL, FLR, ?
A.	HPX
B.	IQY
C.	HPY
D.	HOX
Answer» B. IQY