Correct option is D
Given,
'ABCDEF' is written as 'ZYXWVU' in this question following logic is followed:

Identification:
Identify the logic in each letters in the word:
'ABCDEF' – 'ZYXWVU'
Each letter is the opposite letters.
Z is the opposite of A
Similarly,
For B ⇆ Y
For C ⇆ X
For D ⇆ W
For E ⇆ V
For F ⇆ U
Logic: Letter are opposite
Similarly, for 'MEAT'
? = First letter = M ⇆ N
?= Second letter = E ⇆ V
? =Third letter = A ⇆ Z
? = Fourth letter = T ⇆ G
Final we got the answer is NVZG