When letters from A to Z are numbered from 1 to 26 respectively, the coding of letters is 3 letters forward and 2 letters backward positions alternatively.
F O R G I V E = (F+3), (O-2), (R+3), (G-2), (I+3), (V-2), (E+3) = I M U E L T H
P U R P O S E = (P+3), (U-2), (R+3), (P-2), (O+3), (S-2), (E+3) = S S U N R Q H
M U N D A N E = (M+3), (U-2), (N+3), (D-2), (A+3), (N-2), (E+3) = P S Q B D L H
Correct Option 7)