Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
ac_b_ac_ _aa_d_a_cd_ _
1
acbdcdbcb
2
dadbcbaba
3
cbdcabada
4
bcdbcdaba
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
ac_b_ac_ _aa_d_a_cd_ _