Which set of alphabets should replace the question mark?
a ? c c ? b ? ? c b ? a

a b a c b

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b a b a c

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b a a b c

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b a c b a

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Solution

The correct option is C b a a b c
We have a group of letters where odd positioning group remain same and even positioning group takes the rotation of alphabets i.e. $1$ st letter become $2$ nd, $2$ nd become $3$ rd and $3$ rd become $1$ st.
Hence baabc replaces the question mark ?.

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