Four terms have been given , out of which three are alike in some manner and one is different. Select the odd one out.

Correct option is C

Position of Alphabets:

S-1 =R -1 = Q -1 = P

Option b: FEDC

F-1 = E -1 = D -1 = C

Option c: XWVT

X -1 = W -1 = V -1 $$\mathrlap{\,/}{=}$$ T​

Option d:NMLK

N -1 = M -1 = L -1 = K

Hence, Option (c) is odd one out.