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)

A, G, L, P, S, ?


A) W

B) U

C) Y

D) X

Answer:

Option B

Explanation:

$A + 6 \rightarrow G, G + 5 \rightarrow L, L + 4 \rightarrow P, P + 3 \rightarrow S, S + 2\rightarrow U $

Hence the answer is (b).