Choose the correct cluster of letters to complete the given series.

abb_baa_a_bad_aba

abba

Given: abb_baa_a_bad_aba

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) abab

Lets place option 01 on abb_baa_a_bad_aba to find the series:

--> a b b a b a a b a a b a d b a b a

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

Option (2) ccac

Lets place option 01 on abb_baa_a_bad_aba to find the series:

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

Option (3) abba

Lets place option 01 on abb_baa_a_bad_aba to find the series:

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

Therefore, option (3) follow a particular sequence.