array(
    'type'  => 'radio',
    'value' => 'choice-3',
    'attr'  => array( 'class' => 'custom-class', 'data-foo' => 'bar' ),
    'label' => __('Label', '{domain}'),
    'desc'  => __('Description', '{domain}'),
    'help'  => __('Help tip', '{domain}'),
    'choices' => array( // Note: Avoid bool or int keys http://bit.ly/1cQgVzk
        'choice-1' => __('Choice 1', '{domain}'),
        'choice-2' => __('Choice 2', '{domain}'),
        'choice-3' => __('Choice 3', '{domain}'),
    ),
    // Display choices inline instead of list
    'inline' => false,
)