Dear Diptilata Rout ,
Please do not reply with links only. This is just spoon feeding and evidence that the user did not search enough himself. It would be more beneficial for his future if you tell him how you searched to find those discussions.
A link shall support your own answer, but not replace your own answer.
You may want to read the blog Posting links and the jungle you end up in..and the comments to the blog to understand that it is really not a desired action