‘post’,
    ‘post_status’ => ‘publish’,
    ‘post_category’ => ‘123’,
    ‘posts_per_page’ => 12,
    ‘caller_get_posts’=> 1
    );
    $my_query = null;
    $my_query = new WP_Query($args);
    if( $my_query->have_posts() ) {

    while ($my_query->have_posts()) : $my_query->the_post();
    ?>