Which of the following statements describes integrity?

Which of the following statements best describes the entity integrity rule? Multiple Choice A record’s foreign key value must be null. All values of an attribute must be of the same data type. A record’s primary key must have a data value. A database entity must fit within the REA model.

c)
A record’s primary key must have a data value

primary key of a table describes a rule that the values of the primary must all be unique and primary key of a record can not be empty and it must have a data value.
This is the entity integrity rule.
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