In these questions some of the letters are missing. The missing letters are given in the proper sequence as one of the alternatives. Find the correct alternative.
By Trial and Error method,
Option A
aba | abb | bbb | aab
The above letters do not form a series. Hence option A is incorrect.
Option B
abb | abb | bbb | aab
The above letters do not form a series. Hence option B is incorrect.
Option C
abb | abb | abb | abb
The above letters form a series.
Hence, the correct answer is Option C
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