A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
ACE, BDF, CEG, ?

Let us track the progression of each positional letter across the elements:
1st Letter sequence: A→B→C→D (Consecutive letters)

2nd Letter sequence: C→D→E→F (Consecutive letters)

3rd Letter sequence: E→F→G→H (Consecutive letters)

Combining these gives the next term as DFH.