SQL Identity column

In all of the examples and presentations I have seen, when a DDL table has
an Identity column, it seems to be the Primary key on the table.

My question is: When a table has an Identity column, does the identity
column always have to be defined as the Primary key, or can another column
in the table be defined as a Primary key, and an Index built on the table
specifying the Identity column as being unique?

Thank you,

Doug



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