Which of the following terms will replace the question mark (?) in the given series?

BMXO, EOUM, ?, KSOI, NULG

Given: BMXO, EOUM, ?, KSOI, NULG

Logic: The first position follows the pattern of increasing by 3.

The second position follows the pattern of increasing by 2.

The third position follows the pattern of decreasing by 3.

The fourth position follows the pattern of decreasing by 2.

B + 3 = E; E + 3 = H; H + 3 = K; K + 3 = N

M + 2 = O; O + 2 = Q; Q + 2 = S; S + 2 = U

X - 3 = U; U - 3 = R; R - 3 = O; O - 3 = L

O - 2 = M; M - 2 = K; K - 2 = I; I - 2 = G

So, the missing term in the series will be HQRK.

Thus, the correct answer is option (b).