In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
b _ ac _ cc _ cb _ ab _ ac
_ bcc _ ac _ aabb _ ab _ cc
_ bbca _ bcca _ ac _ a _ cb
cccbb _ aa _ cc _ bbbaa _ c
a _ cdaab _ cc _ daa _ bbb _ ccddd
ccbab _ caa _ bccc _ a _