Select the letter cluster which does not belong to the same group from the given alternatives.

The pattern followed here is: The 2nd letter is 5th succeeding letter of the 1st letter, the 3rd letter is opposite of the 2nd letter and the 4th letter is 3rd preceding letter of the 3rd letter as per the English alphabetical series. In option A, MRIO → 1st letter = M, 2nd letter = M + 5 = R, 3rd letter = I (opp. of I), 4th letter = R - 3 = O In option B, DIRF → 1st letter = D, 2nd letter = D + 5 = I, 3rd letter = R (opp. of I), 4th letter = I - 3 = F In option C, UZAW → 1st letter = U, 2nd letter = U + 5 = Z, 3rd letter = A (opp. of Z), 4th letter = Z - 3 = W In option D, OTGS → 1st letter = O, 2nd letter = O + 5 = T, 3rd letter = G (opp. of T), 4th letter = T - 3 = Q ≠ S