Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
JCH34, KDI43, LEJ52, MFK61, ?

Given: JCH34, KDI43, LEJ52, MFK61, ?

Logic: Letters are increasing + 1 and number is increasing + 9 place.

For, letter

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

C + 1 = D, D + 1 = E, E + 1 = F, F + 1 = G

H + 1 = I, I + 1 = J, J + 1 = K, K + 1 = L

For, number

34 + 9 = 43, 43 + 9 = 52, 52 + 9 = 61, 61 + 9 = 70

So, the missing term is NGL70.

Thus, correct option is (d).