Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter cluster and the fourth letter-cluster is related to the third letter-cluster. NFL: MUO :: HZU: SAF :: KXI:?

The logic followed here is: From the left end, in the 1st and 2nd letter cluster the letters in the 2nd letter cluster are opposite letters of the letters in the 1st letter cluster as per English alphabetical order. Similarly, in the 3rd and 4th letter cluster the letters in the 4th letter cluster are opposite letters of the letters in the 3rd letter cluster English alphabetical order. Similarly, in the 5th and 6th letter cluster the letters in the 6th letter cluster will be 3rd opposite letters of the letters in the 5th letter cluster English alphabetical order. In 'NFL: MUO': Opposite letter of N = M; Opposite letter of F = U; Opposite letter of L = O In 'HZU: SAF': Opposite letter of H = S; Opposite letter of Z = A; Opposite letter of U = F Similarly, in 'KXI:?': Opposite letter of K = P; Opposite letter of X = C; Opposite letter of I = R.