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IN THESE QUESTION WHAT I DID IN 2) there is Multi valued atrribute 

so we will create one table for it with ab as key NAMED it AS(BETA) table and 3) is same where b1 is partial key and depending on first tables primary key so both are equivalent please tell me that i am right or not 

answer is C)

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2 and 3 will have the same sematics
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@shaik

what is meant by semantics here?
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