HTML

hr tag html

<hr> <!-- A horizontal line -->

which is right

---

or

---

in html

<hr> <!--   it represents a horizontal line break, in HTML4.0 we use <hr>, 
            in XHTML1.0 we use <hr/>,  in HTML5(which is the current version of 
            HTML) we can use both <hr> and <hr/>    
       -->

how to style hr tag

border: 10px solid green;
border-radius: 5px;