Select the combination of letters that when sequentially placed from left to right in the blanks of the given letter series will complete the series.

__bc_daabc__a___ccd

aaccdab

Given: __bc_daabc__a___ccd

Selcting the combination of letters that when sequentially placed from left to right in the blanks of the given letter series will complete the series are:

Option (1) cacdcab

Lets place option 01 on __bc_daabc__a___ccd to find the series:

--> c a b c c d a a b c d c a a b c c d

Thus, placing option (1) does not complete any sequence or series.

Option (2) aaccdab

Lets place option 01 on __bc_daabc__a___ccd to find the series:

--> a a b c c d a a b c c d a a b c c d

Therefore, option (2) follow a particular sequence.