Verbal - Series Completion -> Letter Series

DIRECTIONS : In each of the following letter series ,some of the letters are missing which are given in that order as one the alternatives below it . Choose the correct alternatives.
6. abb __ baa__ a __ bab__ aba
  A.  abba
  B.  abab
  C.  ccac
  D.  aabb
7. abca __ bcaab __ca __ bbc __a
  A. ccaa
  B. bbaa
  C. abac
  D. abba

8. b __ abbc ___bbca __bcabb __ ab
  A.  acaa
  B.  acba
  C.  cabc
  D.  cacc
9. ac __ cab ___ baca ___ aba __acac
  A.  aacb
  B.  acbc
  C.  babb
  D.  bcbb
10. m n o n o p q o p q r s __ __ __ __ __
  A.  mnopq
  B.  oqrst
  C.  pqrst
  D.  qrstu
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