Question

Assertion (A): A primary key must be unique and cannot have NULL values.

Reasoning (R): The primary key uniquely identifies each row in the table.

Options

• Both A and R are True and R is the correct explanation for A.

• Both A and R are True and R is not the correct explanation for A.

• A is True but R is False.

• A is False but R is True.

Answer 1

Both A and R are True and R is the correct explanation for A.