<form>
    <fieldset>
        <legend>Select a maintenance drone</legend>

        <div>
            <input type="radio" id="huey" 
                   name="drone" value="huey" checked />
            <label for="huey">Huey</label>
        </div>

        <div>
            <input type="radio" id="dewey" 
                   name="drone" value="dewey" />
            <label for="dewey">Dewey</label>
        </div>

        <div>
            <input type="radio" id="louie" 
                   name="drone" value="louie" />
            <label for="louie">Louie</label>
        </div>

    </fieldset>
</form>

Output