Select the combination of letters that when sequentially placed in the blanks of the given series, will complete the series.
DEFD _ F _ DEFD _ DE _ DEFD
1
DEDE
2
EEFF
3
EFDF
4
EDEF
Select the combination of letters that when sequentially placed in the blanks of the given series, will complete the series.
DEFD _ F _ DEFD _ DE _ DEFD