Easy
Each option is a group of four letters. One group is different from the other three. Find the different group.
Explanation
Explanation
C-F-I-L, J-M-P-S and O-R-U-X increase by 3 letters each time. P-S-V-X ends with a +2 step, so it is different.
PRO TIP
Re-check your working by substituting the answer back into the original question.