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 ::?
# : OSR :: JNM : %​

Given: # : OSR :: JNM : %

Logic: 1st and 3rd three letters are decreasing - 3 place.

Now, we check each options.

Option (a): # = ROU, % = GKQ (Not Follow)

R - 3 = O, O - 3 $$\neq$$​ S, U - 3 = R

J - 3 = G, N - 3 = K, M - 3 $$\neq$$​ Q

Option (b): # = IUU, % = GBQ (Not Follow)​

I - 3 $$\neq$$​ O, U - 3 $$\neq$$​ S, U - 3 = R

J - 3 = G, N - 3 $$\neq$$​ B, M - 3 $$\neq$$​ Q

Option (c): # = UQU, % = GOZ (Not Follow)​

U - 3 $$\neq$$​ O, Q - 3 $$\neq$$​ S, U - 3 = R

J - 3 = G, N - 3 $$\neq$$​ O, M - 3 $$\neq$$​ Z

Option (d): # = RVU, % = GKJ (Follow)​

R - 3 = O, V - 3 = S, U - 3 = R

J - 3 = G, N - 3 = K, M - 3 = J

Thus, correct option is (d).