Nikhil - If you use the Rules module to send your emails out, then it provides Drupal tokens with the node information of a node for certain actions that you can place into your email content. That is usually how I implement that sort of behavior. Since all of the node information is available it allows you to add any information submitted to the node in your email.

Nyk Cowham, Ashlin Interactive Strategy

I have created a custom content called latest news. Once Admin creates a latest news a notification has send on mail. But now if I want to send the exact link of that node in email how I can I do that?