In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
a _ bbc _ aab _ cca _ bbcc
abca _ bcaab _ ca _ bbc _ a
_ bca _ cca _ ca _ b _ c
a _ bccb _ ca _ cca _ baab _ c
ccb _ c _ bbc _ b _ cc _ _ ccbb
_ bcc _ ac _ aabb _ ab _ cc