Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series. c_d_e_b_cb_eed_c_bd_ed_c

beddcbceb edcbdbceb bedcdbceb ebdcdbecb

bedcdbceb

The given pattern is: cbde / edbc / cbde / edbc / cbde / edbc So, the code to be used is: bedcdbceb