In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
CDEF_EDC_DE_FED_
The pattern followed is that in groups of 4, the term 'CDEF' is alternatively repeated in this and reverse order.
=Â CDEFÂ FEDCÂ CDEFÂ FEDC
=> Ans - (A)
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