In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

A, Z, X, B, V, T, C, R, ?, ?

A. P, D
B. E, O
C. Q, E
D. O, Q
E. Q, O
Answer: A . P, D


The first, fourth and seventh letters are in alphabetical order.
So, tenth letter would be the letter after C  i.e. D.
Also, the second and third letters are alternate and in reverse order and so are the fifth and sixth letters and the eighth and ninth letters.