Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
a c _ d a _ d d a _ _ d a c _ d
1
d a c c d
2
a c d c a
3
c c d a d
4
d c c d d
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
a c _ d a _ d d a _ _ d a c _ d