When a primary key is define in the table, DBMS automatically creates a ____ on a primary key column.

When a primary key is define in the table, DBMS automatically creates

1.	When a primary key is define in the table, DBMS automatically creates a ____ on a primary key column.
A.	Unique index
B.	Sequence
C.	Trigger
D.	Synonym
Answer» B. Sequence