Direction: Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it.
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__ ab__b__aba __ __abab
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- a bb aa
- bb aa b
- ab aa b
- a aa ba
Correct Option: D
The given letter series in below pattern.
a a b a b
After using the pattern the complete letter series will be as below.
a a b a b/ a a b a b/ a a b a b