But, it's funny that the info about this is not clear...
The steps necessary to delete your blog:
1. Click into Dashboard
2. Select Tools
3. Select Delete Site
What is your goal?
Did you know that deleting a site removes both the site name and the content forever? Chances are pretty good that there's a better solution.
Please review the options below and make sure you've selected the one that best fits your need.
5. Select "Permanently delete the site and all content" option from drop down menu
Permanently delete the site and all content
Please read carefully. You are trying to permanently delete rajshreelekha.wordpress.com.
If you do not want rajshreelekha.wordpress.com to exist any more, you can delete it. This CAN NOT be undone. It is permanent.
All of your posts and data, and this site's address (rajshreelekha.wordpress.com) will be gone forever.
If you are sure...
I want to permanently remove rajshreelekha.wordpress.com and I am aware I can never get its content or its address back.
8. Click "Delete"
9. Email confirmation from WordPress
10. You confirm
11. Blog deleted
Which part of the 11-step process to delete a blog, rajshreelekha, do you find confusing?