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-abc-bc-bca-c
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- caab
- caac
- bccb
- baca
Correct Option: A
The given letter series in below pattern.
ab c
After completing the pattern, we will get complete letter series.
ab c /abc/ a bc/ a bc /a b c
Hence , required answer is caab .