Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
LOH 1, JMG 8, HKF 27, FIE 64, ?​

Given: LOH 1, JMG 8, HKF 27, FIE 64, ?​

Logic: 1st and 2nd are decreasing - 2, 3rd letter decreasing - 1 place and number is increasing perfect cube of natural number.

For, letter

L - 2 = J, J - 2 = H, H - 2 = F, F - 2 = D

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

H - 1 = G, G - 1 = F, F - 1 = E, E - 1 = D

For, number

1³= 1

2³= 8

3³ = 27

4³= 64

Next number: 5³= 125

So, the missing term is DGD 125.

Thus, correct option is (d).