? a ?b ?abaa ?bab ?abb

aaabb

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ababb

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babab

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babba

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babbb

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Solution

The correct option is D
babba

$T h e s e r i e s i s b a a / b b a / b a a / b b a / b a a / b b . T h u s, t h e p a t t e r n^{'} b a a / b b a^{'} i s r e p e a t e d .$

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