What is the use of defer attribute in script element?

 Posted by Raja on 8/8/2014 | Category: HTML 5 Interview questions | Views: 2780 | Points: 40
Select from following answers:
  1. It makes sure that all the content of the page is loaded then only this script is loads and executes
  2. it is used to defer the load of script in that line and executes in next line
  3. it is used to load the script synchronously
  4. All Above

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