Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ b a _ b b _ _ b b a a _ _ a
1
bbaaab
2
ababaa
3
baaabb
4
abaaab
Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ b a _ b b _ _ b b a a _ _ a