Multiple choice general knowledge math & puzzles Which letter comes next? A C B C C C D C ? c d e f Reveal answer Fill a bubble to check yourself C Correct answer Explanation The sequence follows a pattern where 'C' is a repeating separator: A, C, B, C, C, C, D, C. The primary letters are A, B, C, D. Following this alphabetical progression, the next primary letter after D is E.