Correct Answer: babb

Solution : Given -

ccbab _ caa _ bccc _ a _

Let's check the options.

option first: babc

The series becomes ccbab b caa a bccc b a c

There is no pattern in the above series.

option second: babb

The series becomes ccbab b caa a bccc b a b

The pattern in the series becomes ccba/bbca/aabc/ccba/b.

option third: bbba

The series becomes ccbab b caa b bccc b a a

There is no pattern in the above series.

option fourth: baab

The series becomes ccbab b caa a bccc a a b

There is no pattern in the above series.

Hence, second option is correct.