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  1. Which one of the following attribute can be taken as a primary key ?
    2. A.
    Name
    B.
    Street
    C.
    Id
    D.
    Department

    View Answer

    Workspace

    View Answer

    Answer : Option C

    Explanation :

    Id

    The attributes name , street and department can repeat for some tuples.But the id attribute has to be unique .So it forms a primary key.

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