In the following question a letter-series is given, in which some letters are missing. The missing letters are given in the proper sequence as one of the alternatives. Choose the correct alternatives. ab __ d __ aaba __ na _ badna _ b
A
andaa
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B
babda
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C
dbanb
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D
badna
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Solution
The correct option is B andaa The series is abadna/abadna/abadna/ab. The pattern 'abadna' is repeated