Select the option that is related to the third term in the same way as the second term is related to the first term.
DIET : WXRSVWGH :: COZY : ?

Let's analyze the relationship between the first term DIET and second term WXRSVWGH.
Notice that each letter of the 4-letter word DIET corresponds to a pair of 2 letters in the 8-letter code.

Let's look at the opposite letters (pairs whose positional sum is 27):

Opposite of D is W (4+23=27)

Opposite of I is R (9+18=27)
Filo

Opposite of E is V (5+22=27)
Filo

Opposite of T is G (20+7=27)

Now examine how the pairs are formed around these opposite letters:

For D→ Opposite is W. The pair is WX (W and W+1).

For I→ Opposite is R. The pair is RS (R and R+1).

For E→ Opposite is V. The pair is VW (V and V+1).

For T→ Opposite is G. The pair is GH (G and G+1).

Let's apply this exact pattern to COZY:

C→ Opposite is X. Pair: X,X+1→XY

O→ Opposite is L. Pair: L,L+1→LM

Z→ Opposite is A. Pair: A,A+1→AB

Y→ Opposite is B. Pair: B,B+1→BC

Combining these pairs sequentially gives: XYLMABBC.