Correct option is D

Logic: first letter + 7 = second letter, second letter - 5 = third letter
PWR → P + 7 = W, W - 5 = R
JQL → J + 7 = Q, Q - 5 = L
MTO → M + 7 = T, T - 5 = O
GNJ → G + 7 = N, N - 4 = J
Only GNJ does not follow the -5 second step.
Final Correct Option: (D)