HTML & CSS quiz. How will you add a link to an <b>E-mail</b> addres

How will you add a link to an E-mail address?

<mail href="[email protected]" />
<mail>[email protected]</mail>
<a href="mailto:[email protected]">Send E-mail</a>
<a link="[email protected]">send email</a>
<link email="[email protected]">send email</link>

<!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>E-mail address</title>
 </head>
 <body>
 <p>
<a href="mailto:[email protected]">
Ask your questions using E-mail</a>

<!-- Clicking hyperlink text
 "Ask your questions using E-mail"
will start an application for working with E-mail-->

</p>
 </body>
 </html>