What will come in place of the question mark (?) in the following letter series? A, C, E, G, ? MCQ with Answer and Explanation

Explanation:
The second and fourth letters (K and L) are static. The first and third letters are in alphabetical order starting with C. So, the missing letters are IKJL.[reference:11]

Explanation:
The differences are: +3, +3, +3. The next letter is N.

Explanation:
J(10)+3=M(13), M+5=R(18), R+7=Y(25), Y+9=34→8=H. So H.