Multiple choice Which statement is true about the well formed XML documents? XML elements starts with opening tag but it does not need a closing tag. XML documents may or may not have a root element. XML attribute values need to be quoted. XML elements need to be properly nested. XML tags are not case sensitive. Reveal answer Fill a bubble to check yourself D Correct answer Explanation This is correct because if we do not put the elements properly, it alters the web page. So, XML elements must be properly nested.