Which is more correct to use for a line break? 1)</BR>. 2)<BR />

Answer 1

well technically you could just do <br> without closing and it should work the same :/

Answer 2

2)<br/>
https://www.sololearn.com/learn/HTML/1028/

Answer 3

I think the second one because the first one is looking like a closing tag and makes the code unreadable for others, but if you're interested in this part you can take a look at the googles style guide which debates especially things like this.
https://google.github.io/styleguide/htmlcssguide.html