Display radio fields.
Code Sample:
array( 'id' => 'radio_field5', 'title' => __('Radio Field','text-domain'), 'details' => __('Description of radio field','text-domain'), 'type' => 'radio', 'default' => 'option_3', 'args' => array( 'option_1' => __('Option 1','text-domain'), 'option_2' => __('Option 2','text-domain'), 'option_3' => __('Option 3','text-domain'), 'option_4' => __('Option 4','text-domain'), ), ),
Preview: