The question has a series of small letters which follow a set pattern where some letters are missing. The missing letters are given in their proper sequence in one of the alternative. Find out the correct answer.
aa _ aaa _ aaaa _ aaaa _ b
A
baaa
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B
bbaa
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C
bbbb
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D
bbba
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Solution
The correct option is D bbba a is increasing in every sequence by one. So,the series is aab / aaab / aaaab / aaaaab and hence, correct answer is option D.