Why is this nested list incorrect?
<ul> <li>Item 1</li> <ul> <li>Sub-item 1</li> </ul> <li>Item 2</li> </ul>
Should use <ol> instead of <ul>
<ol>
<ul>
The nested <ul> should be within an <li> element
<li>
The above code is correct
Missing opening <ul> tag for nested list