Đâu là tag tạo ra liên kết (links) trong web

<a url="http://www.w3schools.com">w3schools.com</a>

<a>http://www.w3schools.com</a>

<a href="http://www.w3schools.com">w3schools</a>

<a name="http://www.w3schools.com">w3schools.com</a>