Oracle query to display all policies existing in the database?

Can anyone tell me what will be the "Oracle Query to display all policies existing in the database"?

select * from all_policies; (gives all_database policies)
or
select * from DBA_POLICIES;(gives only dba users policies)
or
select * from user_policies;(gives only the particular user policies).

use any of the above query u'l get the policies which ever exitsts in database

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