Solution:The pattern followed here is :(1st letter + 1) = 2nd letter & sum of place value is 26
UVD → (U + 1 = V), {V(22) + D(4)} = 26
PQI → (P + 1 = Q), {Q(17) + I(9) = 26
EFT→ (E + 1 = F), {F(6) + T(20)} = 26
But,
JKZ → (J + 1 = K), {K(11) + Z(26)} = 37
Hence, JKZ is the correct answer.