Correct Answer: USVGDH

Solution : Given:
The code for GRAVYS is DUJVBY and the code for BUTLTS is WXEVWO.

Divide the letters of GRAVYS into two parts, reverse the letters of the two parts, and add three to the place value of each of the letters –
GRA→ARG; VYS→SYV
A + 3 = D; R + 3 = U; G + 3 = J; S + 3 = V; Y + 3 = B; V + 3 = Y
Thus, GRAVYS is coded as DUJVBY.
Likewise, divide the letters of BUTLTS into two parts, reverse the letters of the two parts, and add three to the place value of each of the letters –
BUT→TUB; LTS→STL
T + 3 = W; U + 3 = X; B + 3 = E; S + 3 = V; T + 3 = W; L + 3 = O
Thus, BUTLTS is coded as WXEVWO.
Similarly, follow the same pattern for SPREAD –
SPR→RPS; EAD→DAE
R + 3 = U; P + 3 = S; S + 3 = V; D + 3 = G; A + 3 = D; E + 3 = H

So, SPREAD is coded as USVGDH. Hence, the fourth option is correct.