Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ?
# : DFJ :: LNR : %​

Given: # : DFJ :: LNR : %​

Logic: 1st and 3rd three letters are increasing + 3 place.

Now, we check each options.

Option (a): # = ACG , % = OQP (Not Follow)

A + 3 = D, C + 3 = F, G + 3 = J

L + 3 = O, N + 3 = Q, R + 3 $$\neq$$​ P

Option (b: # = BCG , % = OQU (Not Follow)​

B + 3 $$\neq$$​ D, C + 3 = F, G + 3 = J

L + 3 = O, N + 3 = Q, R + 3 = U

Option (c): # = ACG , % = OQU (Follow)​

A + 3 = D, C + 3 = F, G + 3 = J

L + 3 = O, N + 3 = Q, R + 3 = U

Option (d): # = ACG , % = MQU (Not Follow)​

A + 3 = D, C + 3 = F, G + 3 = J

L + 3 $$\neq$$​ M, N + 3 = Q, R + 3 = U

Thus, correct option is (c).