Select the triad that follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern. 
KF-MH-OQ
ID-KF-MO

Given: 

KF-MH-OQ
ID-KF-MO

Logic: 1st letter + 2 = 3rd letter, 3rd letter + 2 = 5th letter

2nd letter + 2 = 4th letter, 4th letter + 9 = 6th letter

For, KF-MH-OQ

K + 2 = M, M + 2 = O

F + 2 = H, H + 9 = Q

For, ID-KF-MO

I + 2 = K, K + 2 = M

D + 2 = F, F + 9 = O
Now, we check each options.
​Option (a): GB-ID-KN (Not Follow)

G + 2 = I, I + 2 = K

B + 2 = D, D + 9 $$\neq$$​ N

​Option (b): HB-ID-KN (Not Follow)​

H + 2 $$\neq$$​ I, I + 2 = K

B + 2 = D, D + 9 $$\neq$$​ N

​Option (c): HB-IC-KN (Not Follow)​

H + 2 $$\neq$$​ I, I + 2 = K

B + 2 $$\neq$$​ C, C + 9 $$\neq$$​ N

​Option (d): GB-ID-KM (Follow)​

G + 2 = I, I + 2 = K

B + 2 = D, D + 9 = M
Thus, correct option is (d).