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What is a primary key in a relational database?a . C . An index for sorting recordsb.D . A secondary key used for backup purposesc.A

What is a primary key in a relational database?a

.

.

An index for sorting recordsb.D

.

A secondary key used for backup purposesc.A

.

A field that uniquely identifies a record in a tabled.B

.

A table that stores primary data

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