Which statement is correct concerning Primary Key?

 Posted by vishalneeraj-24503 on 1/2/2015 | Category: Sql Server Interview questions | Views: 815 | Points: 40
Select from following answers:
  1. Primary Key can not accept null values.
  2. By default,Primary key is clustered index.
  3. We can have only one Primary key in a table.
  4. Primary key can be made foreign key into another table.
  5. All Above

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