Select the alphanumeric term that can replace the question mark (?) in the following series.

E972D, H324E, K108G, N36J, Q12N, ?

Given: E972D, H324E, K108G, N36J, Q12N, ?

First letters: E → H → K → N → Q → ?

Logic:  First letters: Increase by +3, Numbers: Divide by 3, Last letters: Increase by +1, +2, +3, +4, +5

E +3→ H +3 → K +3 → N +3 → Q +3 → T

972 → 324 → 108 → 36 → 12 → ?

972 ÷ 3 = 324

324 ÷ 3 = 108

108 ÷ 3 = 36

36 ÷ 3 = 12

12 ÷ 3 = 4

D → E → G → J → N → ?

The sequence follows this pattern:

D + 1 → E

E  + 2  → G

G + 3 → J

J  +  4 → N

N + 5→ S

Now, the next pair will be: T4S

Thus, the correct option is (c) T4S.