Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
AB_ _ _CBA_ _ _DD_ _ _ABCD_ _ BAA_ _ _ _CBA
1
ACBDECDEAACECDD
2
ABEAACDECDEECDD
3
ABBAACDEECBECDD
4
CDDABCCBADCBCDD
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
AB_ _ _CBA_ _ _DD_ _ _ABCD_ _ BAA_ _ _ _CBA