selected

If present, this Boolean attribute indicates that the option is initially selected. If the <code><option></code> element is the descendant of a <a title="The HTML <select> element represents a control that provides a menu of options:" href="/en-US/docs/Web/HTML/Element/select"><code><select></code></a> element whose <code><a href="/en-US/docs/Web/HTML/Element/select#attr-multiple">multiple</a></code> attribute is not set, only one single <code><option></code> of this <a title="The HTML <select> element represents a control that provides a menu of options:" href="/en-US/docs/Web/HTML/Element/select"><code><select></code></a> element may have the <code>selected</code> attribute.