Correct Answer: ADZV

Solution : Let's check the options –
First option: ADZV; The First and the third letters are opposite letters but the second and the fourth letters are not opposite letters.
Second option: MPNK; The first and the third letters are opposite letters similarly, the second and the fourth letters are opposite letters.
Third option: FIUR; The first and the third letters are opposite letters similarly, the second and the fourth letters are opposite letters.
Fourth option: TWGD; the first and the third letters are opposite letters similarly, the second and the fourth letters are opposite letters.

So, only the first option is different from the other three options. Hence, the first option is correct.