Correct option is C

Logic: 1st letter + 3 and 2nd is the opposite letter of 3rd.
From option (a) RUF → R (18) + 3 = U ↔ F
Option (b) ADW → A (1) + 3 = D ↔ W
Option (c) GTQ → G (7) + 13 = T ↔ Q
Option (d) KNM → K (11) + 3 = N ↔ M
Correct answer is (c).