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Question

Which sequence of letters when placed in the blanks one after the other will complete the given letter series ?
ab _ ba _ abab _ _

A
aaaa
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B
babb
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C
aaba
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D
aaab
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Solution

The correct option is D aaaa
Option A is the correct answer.
Explanation:
Divide the series in equal parts
ab _ /ba _/ aba/b _ _
The series aba and baa are repeated alternatively.
aba /baa/aba/baa
Hence, the missing term is aaaa.

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