Select the combination of letters that, when sequentially from left to right in the gaps of the given letter series, will complete the letter series.
c _ cce _ fcdc _ _ ef _ _ cc _ e _
1
ecdefcde
2
eecdeefc
3
dececdef
4
fcfeefcd
Select the combination of letters that, when sequentially from left to right in the gaps of the given letter series, will complete the letter series.
c _ cce _ fcdc _ _ ef _ _ cc _ e _