Select the letter that can replace the question mark (?) in the following series.O, B, L, C, I, D, F, E, ?

Select the letter that can replace the question mark (?) in the follow

1.	Select the letter that can replace the question mark (?) in the following series.O, B, L, C, I, D, F, E, ?
A.	N
B.	H
C.	K
D.	C
Answer» E.