Select the option that represents the combination of letter that, when sequentially placed from left to right in the blanks below, will complete the letter-series.
_cdd_dd_ddc_
1
dccd
2
cddc
3
cdcd
4
dcdc
Select the option that represents the combination of letter that, when sequentially placed from left to right in the blanks below, will complete the letter-series.
_cdd_dd_ddc_