Which one set of letters when sequentially placed at the gaps in the given letter series
shall complete it ?
_bcc_ ac_ aabb_ab_ cc
Going by the options one by one
If we put letters sequentially
starting from the last option we get the given series as
bbccaaccaabbaabbcc
So the given series follows the pattern
bbccaa,ccaabb,aabbcc
So option D is correct .
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