In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
_ bcc _ ac _ aabb _ ab _ cc
b _ ac _ cc _ cb _ ab _ ac
ba _ b _ aabb _ a _ _ a _ bb
a _ ca _ bc _ bcc _ bca
c _ ac _ aa _ aa _ bc _ bcc
_ bbca _ bcca _ ac _ a _ cb