Question: When do we need to use a Surrogate key? When no good candidates are available for primary key When we have multiple foreign keys referencing

When do we need to use a Surrogate key?
When no good candidates are available for primary key
When we have multiple foreign keys referencing many tables
When table has lot of rows with unique values
When table does not have any foreign key
When do we need to use a Surrogate key? When no

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