Which of the following terms will replace the question mark (?) in the given series to make it logically complete?

A169D, B144E, C121F, D100G,?

A169D, B144E, C121F, D100G,?

Logic: first letter is increasing by 1, last letter is increasing by 1, number is perfect square in consecutive decreasing order.

A+1=B, B+1=C, C+1=D, D+1=E

13²=169, 12²=144, 11²=121, 10²=100, 9²=81

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

So, missing term = E81H

Thus, correct option is (c).