how to remove nofollow rel in blogger comments

This is really easy to remove nofollow rel in blogger comments as it takes no time. Goto Design and edit HTML.
Click on expand widgets templates
Then search for <a href='data:comment.authorUrl' rel='nofollow'>
If you blog is nofollow then you will get this line else not.
Then either delete rel='nofollow'
or change nofollow to dofollow

This will work.