Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
a _ _ gb _ _ acegb _ _ aceg _ _ _
1
cefbdfdfd
2
fdfbdfced
3
cedfdfbdf
4
dfdfbcedf
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
a _ _ gb _ _ acegb _ _ aceg _ _ _