Select the letter that can replace the question mark (?) in the following series.
C
The pattern followed here is,

Y - 7 → R;
R - 6 → L;
L - 5 → G;
G - 4 → C;
C - 3 → Z
Hence, ‘C’ is the correct answer.What comes next?
Z, X, U, Q, ?
Fill in the missing letter based on an alphabetical pattern.
A, C, E, ?, I
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
G _ C T _ X _ T G X _ T _ X C T G _ C T
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
Q _ P _ M _ A _ T _ Q A _ T M
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
r _ x l _ q _ _ x _ p q _ e _ l p _
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
BKR, DNV, FQZ, ?, JWH
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
AU, BO, CI, DE, ?