| Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? |
| ab_aa_bbb _aaa _bbbbba |
A) abba
B) baab
C) aaab
D) abab
Correct Answer: B
Solution :
The series is \[\text{ab}\underline{\text{b}}\text{/aa}\underline{\text{a}}\text{bbb/}\underline{\text{a}}\text{aaa}\underline{\text{b}}\text{bbb/a}\text{.}\]Thus, the letters are repeated twice, then thrice, then four times and so on.
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