Ans.
Option 4. `<ahref="http://www.intellipaat.com">intellipaat.com</a>`
`href` is an attribute in the HTML `<a>` tag. This means that it is applied in creating links to another page's address. Proper syntax: this applies `href` as the attribute and places the address within double quotes. Everything you wish to click should be placed between the opening `<a>` and closing `</a>` tags.