n each of the following letter series, some of the letters are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
ac _ cab _ baca _ aba _ acac
The series is acac/abab/acac/abab/acac. Thus, the pattern acac/abab is repeated
a _ bbc _ aab _ cca _ bbcc
The series is aabbcc/aabbcc/aabbcc. Thus, the pattern 'aabbcc' is repeated.
_ bbca _ bcca _ ac _ a _ cb
The series is abbc/ac/bcca/ba/caab/cb.
c _ bbb _ _ abbbb _ abbb _
The series is cabbbb/cabbbb/cabbbb. Thus, the pattern 'cabbbb' is repeated.
_ _aba _ _ ba _ ab
The series is ab/ab/ab/ab/ab/ab. Thus, the pattern 'ab' is repeated.
_ tu _ rt _ s _ _ usrtu _
The series rtus/rtus/rtus/rtus. Thus, the pattern 'rtus' is repeated.
abca _ bcaab _ ca _ bbc _ a
The series is abc/aabc/aabbc/aabbcc/a.
_ a _ b _ abaa _ bab _ abb
The series is baa/bba/baa/bba/baa/bb. Thus, the pattern baa/bba is repeated.
_ stt _ tt _ tts _
The series is tst/tst/tst/tst. Thus, the pattern 'tst' is repeated.