Select the triad that follows the same pattern as that followed by the two triads given below. Both triads follow the same pattern.
GB-IE-LN
KF-MI-PR​

Given:

GB-IE-LN
KF-MI-PR

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

2nd letter + 3 = 4th letter, 4th letter + 9 = 6th letter

For, GB-IE-LN

G + 2 = I, I + 3 = L

B + 3 = E, E + 9 = N

For, KF-MI-PR

K + 2 = M, M + 3 = P

F + 3 = I, I + 9 = R

Now, we chheck each options.

Option (a): PJ-QM-TU (Not Follow)

P + 2 $$\neq$$​ Q, Q + 3 = T

J + 3 = M, M + 9 $$\neq$$​ U

Option (b): OJ-QM-TV (Follow)​

O + 2 = Q, Q + 3 = T

J + 3 = M, M + 9 = V

Option (c): OJ-QM-TU (Not Follow)​

O + 2 = Q, Q + 3 = T

J + 3 = M, M + 9 $$\neq$$​ U

Option (d): PJ-QN-TU (Not Follow)​

P + 2 $$\neq$$​ Q, Q + 3 = T

J + 3 $$\neq$$​ N, N + 9 $$\neq$$​ U

Thus, correct option is (b).