Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
NQ31, MP40, LO49, KN58, ?

Given: NQ31, MP40, LO49, KN58, ?

Logic: Letters are decreasing - 1 and numbers are increasing + 9 place.

For, letter

N - 1 = M, M - 1 = L, L - 1 = K, K - 1 = J

Q - 1 = P, P - 1 = O, O - 1 = N, N - 1 = M

For, number

31 + 9 = 40, 40 + 9 = 49, 49 + 9 = 58, 58 + 9 = 67

So, the missing term is JM67.

Thus, correct option is (c).