Show the same Article Available in Other Categories

First you have to create secondary loop and use it.

//     $categories = wp_get_post_categories($post->ID);
     $categories = get_the_category($post->ID);
     foreach ( $categories as $category ) { 
       echo $category->name;
     }

Description

get_the_category( $post->ID );

This tag may be used outside The Loop by passing a post id as the parameter.

Note: This function only returns results from the default “category” taxonomy. For custom taxonomies use get_the_terms().