Correct Answer: OPR – JKL

Solution : Let's check each option –
First option: OPR – JKL;  The opposite letter of O is not J; the opposite letter of P is K; and the opposite letter of R is not L.
Second option: BFX –  YUC;  The opposite letter of B is Y; the opposite letter of F is U; and the opposite letter of X is C.
Third option: PHJ –  KSQ;  The opposite letter of P is K; the opposite letter of H is S; and the opposite letter of J is Q.
Fourth option: RTV –  IGE; The opposite letter of R is I; the opposite letter of T is G; and the opposite letter of V is E.

Therefore, the first option is different from the others as it does not have opposite letters. Hence, the first option is correct.