Explanation:Here in the term 1st letter is increased by 2 and the 2nd letter decreasing by 2.So, the final term is VX.

2.ZA,YB,XC,WD,_____?

A)VE

B)SH

C)EV

D)EV

Answer:A)VE

Explanation:Here in the term 1st letter is increased by 1 and the 2nd letter decreasing by 1.So, the final term is VE .

3.IW,JV,LT,OQ,SM,_____?

A)XI

B)XJ

C)XH

D)VH

Answer:C)XH

Explanation:Here in this series the 1st letter is in increasing order i.e 1,2,3,4 and the 2nd letter is in decreasing order i.e 1,2,3,4.So, the final term is XH.

4.AY,CV,ES,GP,IM,_____?

A) JJ

B) JI

C) KI

D) KJ

Answer:D) KJ

Explanation:Here in this series the difference between the 1stletter is increasing by 2 and the 2nd letter is decreasing by 3.So, the final term is KJ.