Select the letter clusters from among the given options that can replace the question mark (?) in the following series.

ab, cc, ed, ge, ?

Given: ab, cc, ed, ge, ?

Logic: 1st letter increasing + 2 place and 2nd letter increasing + 1 place in English alphabetical order.

a → c (+2), c → e (+2), e → g (+2), g → i (+2)

So, the first letter in the missing term should be i.

b → c (+1), c → d (+1), d → e (+1), e → f (+1)

So, the second letter in the missing term should be f.

The next term should be if.

Thus, correct option is (c).