Four of the following five are alike in a certain way based on the English alphabetical series and so form a group. Which is the one that does not belong to that group?

Let's check option A first to understand the series.
N is the 14th letter, Z is the 26th letter, A is the 1st letter and M is the 13th letter in the aphabetical series.
So, the position of the first letter 'N' from the beginning of the alphabetical series is equal to the position of the last letter 'M' from the end of the alphabetical series. Both are 14.
Similarly, the position of the second letter 'Z' from the first in the alphabetical series is equal to the position of the second last letter from the end of the alphabetical series. Both are 1.
Let's check if this holds true for the second option.
The position of the letter F is 6 and I is 9. The position of the letters R and U from the end of the alphabetical series is 9 and 6 respectively.
Hence, this logic holds true. The option that doesn't follow this logic is wrong.
In option D, E is 5th letter and V is 22nd letter. C and X are 24th and 3rd letters respectively from the end of the alphabetical series. Hence it is wrong.