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)

AZ, CX, FU, ?


A) IR

B) IV

C) JQ

D) KP

Answer:

Option C

Explanation:

1st letter : $A+2 \rightarrow C, C+3 \rightarrow F, F+4\rightarrow J$

2nd letter : $Z-2 \rightarrow X, X-3 \rightarrow U, U-4 \rightarrow Q$

Hence the answer is (c).