Which of the given 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 ::?
# : DZT :: QMG : %​

Given: # : DZT :: QMG : %

Logic: 1st and 3rd three letters are increasing + 5 place.

Now, we check each options.

Option (a): # = OYV, % = PYT (Not Follow)

O + 5 $$\neq$$​ D, Y + 5 $$\neq$$​ Z, V + 5 $$\neq$$​ T

Q + 5 $$\neq$$​ P, M + 5 $$\neq$$​ Y, G + 5 $$\neq$$​ T

Option (b): # = YUO, % = VRL (Follow)​

Y + 5 = D, U + 5 = Z, O + 5 = T

Q + 5 = V, M + 5 = R, G + 5 = L

Option (c): # = YPG, % = KUL (Not Follow)​

​Y + 5 = D, P + 5 $$\neq$$​ Z, G + 5 $$\neq$$​ T

Q + 5 $$\neq$$​ K, M + 5 $$\neq$$​ U, G + 5 = L

Option (d): # = ZTY, % = VMH (Not Follow)​

Z + 5 $$\neq$$​ D, T + 5 $$\neq$$​ Z, Y + 5 $$\neq$$​ T

Q + 5 = V, M + 5 $$\neq$$​ M, G + 5 $$\neq$$​ H

Thus, correct option is (b).