Select the alphanumeric-cluster from among the given options that can replace the question mark (?) in the following series.

E5A, G9C, I17E, K29G, M45I, ?

Given: E5A, G9C, I17E, K29G, M45I, ?

1st letters → Increase by +2

Middle number→ Increase by +4, +8, +12, +16,...

3rd letters → Increase by +2

First Letters:  E → G → I → K → M → ?

E + 2 = G, G + 2 = I, I + 2 = K, M + 2 = O.

5 + 4 → 9 

9 + 8 → 17

17 + 12 → 29

29 + 16 → 45

Third Letters: A → C → E → G → I → K

A + 2 = C, C + 2 = E, E + 2 = G, G + 2 = I, I + 2 = K.

Now, the next term will be: O65K

Thus, the correct option is (b) O65K.