In this type of questions, a series of single, pairs or groups of letters or combinations of letters and numerals are given. The terms of the series form a certain pattern as regards the position of the letter in the English alphabet. Find the missing or wrong term in series 

1)

Z, W, S, P, L, I, E, ?


A) B

B) D

C) F

D) K

Answer:

Option A

Explanation:

Z3W,W4S,S3P,

P4L,L3I,I4E,E3B

Hence the answer is (a).