Which of the following terms will replace the question mark (?) in the given series to make it logically complete?

WXN13, UVL19, STJ25, QRH31, (?)

Given: WXN13, UVL19, STJ25, QRH31, (?)​

Logic: Subtract 2 from the place value of the first letter, and the second letter, and add 6 to the number given in the series.

First letter: W - 2 = U; U - 2 = S; S - 2 = Q; Q - 2 = O​

Second letter: X - 2 = V; V - 2 = T; T - 2 = R; R - 2 = P​

Third letter: N - 2 = L; L - 2 = J; J - 2 = H; H - 2 = F​

Number: 13 + 6 = 19; 19 + 6 = 25; 25 + 6 = 31; 31 + 6 = 37​

So, the missing term is OPF37.

Thus, the correct answer is (b).