In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_ a _ _ c _ b _ _ a b _ c a _ b1
cbbabcba
2
cbbacbba
3
cbabcabb
4
cbbabcbb
In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_ a _ _ c _ b _ _ a b _ c a _ b