What does this code display?

A row of three buttons on top of another row of three buttonsA column of three buttons next to another column of three buttonsSix buttons in one columnSix buttons in one row<html>
<body>
<button>1</button>
<button>2</button>
<button>3</button>
<br>
<button>4</button>
<button>5</button>
<button>6</button>
</body>
</html>]]>

The code displays a row of three buttons on top of another row of three buttons on the webpage.