Uncheck comment status when specific category is checked

Put these codes into your theme's functions.php

<?php
function disable_comment_status_when_specific_category_checked() {
        $cat = get_category_by_slug('info'); // Change 'info' to any category you want to disable comments.
?>
        <script type="text/javascript">
        jQuery('#in-category-<?php echo $cat->term_id; ?>').click(function(){
                if (jQuery(this).is(':checked')) {
                        jQuery('#comment_status').attr('checked', false);
                }
        });
        </script>
<?php
}

add_action('admin_footer', 'disable_comment_status_when_specific_category_checked');