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Question

In the given sequence, some letter are missing. Which of the given options can fill in the blanks in the correct order from left to right?
ab_ab_aaa_bbaaa_bbbb

A
abab
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B
abba
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C
aabb
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D
baba
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Solution

The correct option is D abba
Given sequence is:
ab_ab_aaa_bbaaa_bbbb
By observing the sequence we can say that the pattern followed by sequence is:
Each alphabet is increasing by 1 like : ab/aabb
ab/aabb/aaabbb/aaaabbbb
Thus, the missing alphabets are abba.
Hence, abba is correct answer.

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